ECHO 2013 / Echocardiography for Assessment of Prosthetic Heart Valves
.pdf
Echocardiography for Assessment of Prosthetic Heart Valves
Fletcher A. Miller, Jr, MD
Mayo Clinic Rochester
Nothing to Disclose
©2011 MFMER | slide-1
JASE 22(9); September 2009
Day to day screening of prosthetic valves Is performed by
surface echocardiography with Doppler hemodynamics
Prior to Performing Echo You Should Know
•
•
•
Prosthetic type Prosthetic size
Details of implantation (root enlargement, etc)
CP984963-3
Echocardiography for Assessment of
Aortic Valve Prostheses
©2011 MFMER | slide-5
Doppler
Aortic Prostheses
•Mean gradient
•Effective orifice area
•Acceleration time
•Requrgitation
Presence, type, amount
CP984963-8
“Fingerprint” the prosthesis
•Measure the mean gradient, valve area, acceleration time, and degree of regurgitation soon after implant
•Use this as baseline for future follow up
Aortic Valve Prostheses
Measurement of Mean Gradient and Effective orifice Area
©2011 MFMER | slide-8
Aortic Prosthesis
CW Doppler
CP1009156-13
Continuity Equation
AV area = |
LVOTarea x TVIL |
|
TVIAo |
||
|
Prosthetic Aortic Valve Area
TVIL
AL X
TVIAO
CP984963-13