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Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
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108

S. He

 

 

2.33\ Transesophageal Left Atrial

Appendage View

a1

a2

 

LA

Ao

LAA

RVOT

Fig. 6.37  Transesophageal left atrial appendage view

2.33.1\ Scanning Methods

The patient lies on the left side in a lateral position. The transducer is extracted a little and placed at a distance of about 31–33 cm from the incisor teeth with 45–50° anticlockwise rotation of the beam on the base of two-atrium view.

2.33.2\ Section Structure

The structures visualized are the left atrial appendage, left atrium, aortic root, and right ventricular outflow tract.

2.33.3\ Measuring Method and Normal Value

The transverse diameter of left atrial appendage is 10 ± 5 mm.

2.33.4\ The Clinical Application Value

This view is usually used to diagnose whether the left atrial appendage is dilated and there is thrombosis in left atrial appendage or not in the patients with mitral valve disease or with atrial fibrillation.