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Винницкий национальный медицинский университет им. Н.И.Пирогова

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[НЕСОРТИРОВАННОЕ]

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ECG Interpretation Made Incredibly Easy (5th edition).pdf

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Brushing up on interpretation skills

Use these sample rhythm strips as a practical way to brush up on your ECG interpretation skills. Record the rhythm, rates, and waveform characteristics in the blank spaces provided, and then compare your findings with the answers beginning on page 329.

Atrial rhythm: ________________	QRS complex: ________________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

310

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Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

10.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

11.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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12.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

13.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

14.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

BRUSHING UP ON INTERPRETATION SKILLS	315

15.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

16.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

17.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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316

18.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

19.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

20.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

BRUSHING UP ON INTERPRETATION SKILLS	317

21.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

22.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

23.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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24.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

25.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

26.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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27.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

28.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

29.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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320

30.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

31.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

32.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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33.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

34.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

35.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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322

36.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

37.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

38.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

BRUSHING UP ON INTERPRETATION SKILLS	323

39.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

40.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

41.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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324

42.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

43.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

44.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

BRUSHING UP ON INTERPRETATION SKILLS	325

45.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

46.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

47.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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326

48.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

49.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

50.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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51.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

52.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

53.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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54.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

55.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

56.

Atrial rhythm:________________	QRS complex: _______________
Ventricular rhythm: ___________	T wave:______________________
Atrial rate: ___________________	QT interval: __________________
Ventricular rate: ______________	Other: _______________________
P wave:______________________	Interpretation: ________________
PR interval: __________________	_____________________________

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Answers

Atrial rhythm: Regular, except for missing PQRST complex Ventricular rhythm: Regular, except for missing PQRST complex Atrial rate: 40 beats/minute; underlying rate 50 beats/minute

Ventricular rate: 40 beats/minute

P wave: Normal size and configuration; absent during pause

PR interval: 0.20 second QRS complex: 0.08 second

T wave: Normal configuration; absent during pause

QT interval: 0.40 second Other: None Interpretation: Sinus arrest

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 60 beats/minute; underlying rate 88 beats/minute

Ventricular rate: 90 beats/minute

P wave: None with premature ventricular contractions (PVCs); present with QRS complexes

PR interval: 0.16 second

QRS complex: Underlying rate 0.08 second; 0.16 second with PVCs T wave: Normal configuration; opposite direction with PVCs

QT interval: 0.42 second Other: None

Interpretation: Normal sinus rhythm with trigeminal PVCs

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 125 beats/minute

Ventricular rate: 125 beats/minute

P wave: Normal size and configuration

PR interval: 0.14 second

QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.32 second

Other: None

Interpretation: Sinus tachycardia

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Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 60 beats/minute; underlying rate 71 beats/minute

Ventricular rate: 70 beats/minute

P wave: None with PVC; present with QRS complexes

PR interval: 0.16 second

QRS complex: 0.08 second; 0.14 second with PVC T wave: Normal configuration

QT interval: 0.40 second Other: None

Interpretation: Normal sinus rhythm with PVC

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 40 beats/minute; underlying rate 70 beats/minute

Ventricular rate: 70 beats/minute

P wave: None with PVCs; present with QRS complexes

PR interval: 0.16 second

QRS complex: 0.08 second; 0.16 second with PVCs T wave: Normal configuration

QT interval: 0.40 second Other: None

Interpretation: Normal sinus rhythm with run of PVCs

Atrial rhythm: Absent

Ventricular rhythm: Chaotic

Atrial rate: Absent

Ventricular rate: Undetermined

P wave: Absent

PR interval: Unmeasurable

QRS complex: Indiscernible

T wave: Indiscernible

QT interval: Not applicable

Other: None

Interpretation: Ventricular fibrillation

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Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 90 beats/minute; underlying rate 107 beats/minute

Ventricular rate: 110 beats/minute

P wave: Present in normal QRS complexes

PR interval: 0.16 second QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.32 second

Other: Random pacemaker spikes

Interpretation: Sinus tachycardia with pacemaker failure to sense

Atrial rhythm: Unmeasurable Ventricular rhythm: Regular

Atrial rate: Unmeasurable

Ventricular rate: Paced rate 40 beats/minute; pacer fires at 75 beats/minute

P wave: Absent

PR interval: Unmeasurable QRS complex: Unmeasurable T wave: Unmeasurable

QT interval: Unmeasurable

Other: None

Interpretation: Paced rhythm with failure to capture

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: Indiscernible

Ventricular rate: 80 beats/minute

P wave: Absent; fine fibrillation waves present

PR interval: Indiscernible

QRS complex: 0.08 second

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Atrial fibrillation

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10.

Atrial rhythm: Regular Ventricular rhythm: Irregular

Atrial rate: 50 beats/minute

Ventricular rate: 40 beats/minute

P wave: Normal; some not followed by QRS complexes PR interval: 0.16 second and constant (may be prolonged)

QRS complex: 0.08 second

T wave: Normal configuration; absent if QRS complexes are absent

QT interval: 0.40 second Other: None

Interpretation: Type II second-degree atrioventricular (AV) block

11.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: 60 beats/minute

Ventricular rate: 70 beats/minute

P wave: Rate and configuration varies

PR interval: Varies with rhythm

QRS complex: 0.10 second

T wave: Configuration varies

QT interval: Configuration varies

Other: None

Interpretation: Sick sinus syndrome

12.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 110 beats/minute

Ventricular rate: 110 beats/minute

P wave: Normal size and configuration

PR interval: 0.16 second

QRS complex: 0.10 second

T wave: Normal configuration

QT interval: 0.36 second

Other: None

Interpretation: Sinus tachycardia

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13.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 270 beats/minute

Ventricular rate: 70 beats/minute

P wave: Saw-tooth edged

PR interval: Unmeasurable

QRS complex: 0.10 second

T wave: Unidentifiable

QT interval: Unidentifiable

Other: None

Interpretation: Atrial flutter (4:1 block)

14.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: About 110 beats/minute

Ventricular rate: About 110 beats/minute

P wave: Size and configuration vary

PR interval: Rate varies

QRS complex: 0.08 second

T wave: Inverted

QT interval: 0.22 second

Other: None

Interpretation: Multifocal atrial tachycardia

15.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 100 beats/minute

Ventricular rate: 100 beats/minute

P wave: Normal size and configuration, except during premature beat

PR interval: 0.16 second; unmeasurable for premature beat

QRS complex: 0.06 second

T wave: Normal configuration

QT interval: 0.36 second Other: None

Interpretation: Sinus tachycardia with PVCs

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16.

Atrial rhythm: Unmeasurable

Ventricular rhythm: Regular

Atrial rate: Unmeasurable

Ventricular rate: 187 beats/minute

P wave: Absent

PR interval: Unmeasurable

QRS complex: 0.18 second; wide and bizarre

T wave: Opposite direction of QRS complex

QT interval: Unmeasurable

Other: None

Interpretation: Ventricular tachycardia (monomorphic)

17.

Atrial rhythm: Unmeasurable

Ventricular rhythm: Unmeasurable; fibrillatory waves present Atrial rate: Unmeasurable

Ventricular rate: Unmeasurable P wave: Absent

PR interval: Absent

QRS complex: Unmeasurable

T wave: Opposite direction of QRS complex

QT interval: Absent Other: None

Interpretation: Ventricular fibrillation

18.

Atrial rhythm: Regular Ventricular rhythm: Irregular

Atrial rate: 75 beats/minute

Ventricular rate: 50 beats/minute

P wave: Normal size and configuration

PR interval: Lengthens with each cycle until dropped

QRS complex: 0.06 second

T wave: Normal configuration

QT interval: 0.38 second Other: None

Interpretation: Type 1 (Mobitz I or Wenckebach) second-degree AV block

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19.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 90 beats/minute

Ventricular rate: 30 beats/minute

P wave: Normal size and configuration, except when hidden within T wave

PR interval: Rate varies QRS complex: 0.16 second

T wave: Normal configuration

QT interval: 0.56 second Other: None

Interpretation: Third-degree AV block

20.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 60 beats/minute

Ventricular rate: 60 beats/minute

P wave: Normal size and configuration

PR interval: 0.36 second QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.40 second Other: None

Interpretation: Normal sinus rhythm with first-degree AV block

21.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 35 beats/minute

Ventricular rate: 35 beats/minute

P wave: Normal configuration

PR interval: 0.18 second

QRS complex: 0.12 second

T wave: Normal configuration

QT interval: 0.44 second

Other: None

Interpretation: Sinus bradycardia

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22.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 50 beats/minute

Ventricular rate: 50 beats/minute

P wave: Normal configuration

PR interval: 0.20 second QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.52 second Other: None

Interpretation: Sinus bradycardia with premature atrial contraction (PAC)

23.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: Unmeasurable

Ventricular rate: 60 beats/minute

P wave: Not present

PR interval: Unmeasurable

QRS complex: 0.06 second

T wave: Flattened

QT interval: Unmeasurable

Other: None

Interpretation: Junctional escape rhythm

24.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: Unmeasurable

Ventricular rate: 38 beats/minute

P wave: Absent

PR interval: Unmeasurable

QRS complex: 0.04 second

T wave: Normal configuration

QT interval: 0.44 second

Other: None

Interpretation: Junctional rhythm

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25.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 68 beats/minute

Ventricular rate: 43 beats/minute

P wave: Normal configuration PR interval: Unmeasurable

QRS complex: 0.12 second

T wave: Normal configuration QT interval: Unmeasurable

Other: P wave no correlation with QRS complex Interpretation: Third-degree AV block

26.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 100 beats/minute

Ventricular rate: 100 beats/minute

P wave: Normal initially, then becomes inverted with shortened PR interval

PR interval: 0.14 second initially, then unmeasurable

QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.36 second Other: None

Interpretation: Sinus tachycardia leading to junctional tachycardia

27.

Atrial rhythm: Not present

Ventricular rhythm: Regular

Atrial rate: Not present

Ventricular rate: 30 beats/minute

P wave: Absent

PR interval: Unmeasurable

QRS complex: Abnormal

T wave: Abnormal configuration

QT interval: Unmeasurable

Other: None

Interpretation: Idioventricular rhythm

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28.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 280 beats/minute

Ventricular rate: 110 beats/minute

P wave: Flutter waves

PR interval: Unmeasurable

QRS complex: 0.08 second

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Atrial flutter with variable block

29.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 94 beats/minute

Ventricular rate: 94 beats/minute

P wave: Inverted

PR interval: 0.12 second QRS complex: 0.08 second

T wave: Inverted

QT interval: 0.30 second Other: None

Interpretation: Accelerated junctional rhythm

30.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: 70 beats/minute

Ventricular rate: 70 beats/minute

P wave: Normal

PR interval: 0.16 second

QRS complex: 0.10 second

T wave: Biphasic

QT interval: 0.38 second

Other: None

Interpretation: Sinus arrhythmia

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31.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: 60 beats/minute

Ventricular rate: 60 beats/minute

P wave: Variable configurations

PR interval: 0.16 second

QRS complex: 0.10 second

T wave: Inverted

QT interval: 0.36 second

Other: None

Interpretation: Wandering pacemaker

32.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 180 beats/minute

Ventricular rate: 100 beats/minute

P wave: Abnormal; slight saw-tooth appearance PR interval: Unmeasurable

QRS complex: 0.10 second

T wave: Abnormal configuration QT interval: Unmeasurable

Other: None

Interpretation: Atrial flutter with varying conduction ratios

33.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 88 beats/minute

Ventricular rate: 88 beats/minute P wave: Normal

PR interval: 0.16 second QRS complex: 0.08 second T wave: Normal

QT interval: 0.40 second

Other: ST-segment depression

Interpretation: Normal sinus rhythm with PACs

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34.

Atrial rhythm: Slightly irregular

Ventricular rhythm: Slightly irregular

Atrial rate: 110 beats/minute

Ventricular rate: 110 beats/minute

P wave: P wave shape different for multiple P waves PR interval: Unmeasurable

QRS complex: 0.08 second

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Multifocal atrial tachycardia

35.

Atrial rhythm: Absent

Ventricular rhythm: Absent

Atrial rate: Absent

Ventricular rate: Absent

P wave: Absent

PR interval: Unmeasurable

QRS complex: Absent

T wave: Absent

QT interval: Unmeasurable

Other: None

Interpretation: Asystole

36.

Atrial rhythm: Regular

Ventricular rhythm: Irregular

Atrial rate: 80 beats/minute

Ventricular rate: 60 beats/minute

P wave: Biphasic

PR interval: 0.12 second

QRS complex: 0.12 second

T wave: Normal

QT interval: 0.34 second

Other: Two P waves without QRS complex

Interpretation: Second-degree AV block type II

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37.

Atrial rhythm: Absent

Ventricular rhythm: Absent

Atrial rate: Absent

Ventricular rate: Absent

P wave: Absent

PR interval: Unmeasurable

QRS complex: Absent

T wave: Absent

QT interval: Unmeasurable

Other: None

Interpretation: Asystole

38.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 60 beats/minute

Ventricular rate: 120 beats/minute

P wave: Biphasic when present

PR interval: 0.16 second QRS complex: 0.10 second

T wave: Elevated

QT interval: 0.40 second when measurable

Other: None

Interpretation: Normal sinus rhythm with PVCs

39.

Atrial rhythm: Indiscernible Ventricular rhythm: Regular

Atrial rate: Indiscernible

Ventricular rate: 38 beats/minute

P wave: Indiscernible

PR interval: Unmeasurable

QRS complex: 0.36 second

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Idioventricular rhythm

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40.

Atrial rhythm: Regular Ventricular rhythm: Irregular

Atrial rate: 70 beats/minute

Ventricular rate: 140 beats/minute

P wave: Normal with sinus beats

PR interval: 0.14 second QRS complex: 0.08 second

T wave: Distorted

QT interval: Unmeasurable

Other: None

Interpretation: Normal sinus rhythm with PVCs (bigeminy)

41.

Atrial rhythm: Irregular

Ventricular rhythm: Irregular

Atrial rate: Indiscernible

Ventricular rate: 100 beats/minute

P wave: Indiscernible

PR interval: Unmeasurable

QRS complex: 0.08 second

T wave: Flattened

QT interval: Unmeasurable

Other: None

Interpretation: Atrial fibrillation

42.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: Indiscernible

Ventricular rate: 150 beats/minute P wave: None

PR interval: Unmeasurable

QRS complex: 0.04 second in nonpaced beats T wave: Flattened

QT interval: Unmeasurable Other: ST-segment depression

Interpretation: Atrial fibrillation with ventricular pacing

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43.

Atrial rhythm: None

Ventricular rhythm: Chaotic

Atrial rate: None

Ventricular rate: Unmeasurable

P wave: Indiscernible

PR interval: Unmeasurable

QRS complex: Unmeasurable

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Ventricular fibrillation

44.

Atrial rhythm: Not visible

Ventricular rhythm: Regular

Atrial rate: Indiscernible

Ventricular rate: 150 beats/minute

P wave: Not visible

PR interval: Unmeasurable

QRS complex: 0.12 second

T wave: Normal

QT interval: 0.24 second

Other: None

Interpretation: Junctional tachycardia

45.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 80 beats/minute

Ventricular rate: 80 beats/minute

P wave: Normal configuration

PR interval: 0.22 second QRS complex: 0.10 second

T wave: Normal configuration

QT interval: 0.38 second Other: None

Interpretation: First-degree AV block with bigeminal PACs

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46.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 150 beats/minute

Ventricular rate: 150 beats/minute

P wave: Peaked

PR interval: 0.12 second

QRS complex: 0.08 second

T wave: Flattened

QT interval: 0.24 second

Other: None

Interpretation: Atrial tachycardia

47.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 79 beats/minute

Ventricular rate: 79 beats/minute

P wave: Normal configuration

PR interval: 0.16 second

QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.40 second

Other: None

Interpretation: Normal sinus rhythm

48.

Atrial rhythm: None

Ventricular rhythm: Regular

Atrial rate: Indiscernible

Ventricular rate: 60 beats/minute

P wave: Not present

PR interval: Unmeasurable

QRS complex: 0.06 second

T wave: Normal configuration

QT interval: 0.32 second

Other: None

Interpretation: Junctional escape rhythm

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49.

Atrial rhythm: Indiscernible Ventricular rhythm: Chaotic

Atrial rate: Unmeasurable

Ventricular rate: Greater than 300 beats/minute P wave: Indiscernible

PR interval: Unmeasurable

QRS complex: Abnormal

T wave: Indiscernible

QT interval: Unmeasurable

Other: None

Interpretation: Ventricular tachycardia

50.

Atrial rhythm: Slightly irregular

Ventricular rhythm: Slightly irregular

Atrial rate: 70 beats/minute

Ventricular rate: 70 beats/minute

P wave: Normal configuration

PR interval: 0.20 second QRS complex: 0.08 second

T wave: Normal configuration

QT interval: 0.36 second

Other: Phasic slowing and quickening

Interpretation: Sinus arrhythmia

51.

Atrial rhythm: Regular Ventricular rhythm: Regular

Atrial rate: 60 beats/minute

Ventricular rate: 60 beats/minute

P wave: Inverted

PR interval: 0.08 second QRS complex: 0.12 second

T wave: Normal configuration

QT interval: 0.44 second Other: None

Interpretation: Junctional escape rhythm

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52.

Atrial rhythm: Unmeasurable Ventricular rhythm: Irregular

Atrial rate: Unmeasurable

Ventricular rate: Unmeasurable P wave: Absent

PR interval: Absent

QRS complex: Unmeasurable T wave: Indiscernible

QT interval: Unmeasurable

Other: Continuous switching of ventricular rhythm between positive and negative directions

Interpretation: Torsades de pointes

53.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 107 beats/minute; pacemaker generated

Ventricular rate: 107 beats/minute; pacemaker generated

P wave: Follows pacer spike

PR interval: 0.12 seconds

QRS complex: 0.06 second

T wave: Normal configuration

QT interval: 0.28 second

Other: Pacemaker spikes

Interpretation: AV pacing

54.

Atrial rhythm: Regular Ventricular rhythm: Irregular

Atrial rate: 80 beats/minute

Ventricular rate: 60 beats/minute

P wave: Normal configuration

PR interval: 0.24 second QRS complex: 0.12 second

T wave: Normal configuration

QT interval: 0.38 second

Other: Dropped ventricular beats

Interpretation: Normal sinus rhythm with Type II second-degree AV block

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55.

Atrial rhythm: Irregular Ventricular rhythm: Irregular

Atrial rate: 70 beats/minute

Ventricular rate: 80 beats/minute

P wave: Normal configuration but absent on premature beats

PR interval: 0.20 second QRS complex: 0.08 second

T wave: Flattened

QT interval: Unmeasurable

Other: None

Interpretation: Normal sinus rhythm with premature junctional complexes

56.

Atrial rhythm: Regular

Ventricular rhythm: Regular

Atrial rate: 50 beats/minute

Ventricular rate: 50 beats/minute

P wave: Normal configuration

PR interval: 0.16 second

QRS complex: 0.12 second

T wave: Normal configuration

QT interval: 0.44 second

Other: None

Interpretation: Sinus bradycardia

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