This method is based on determining the pressure gradient half time (PHT) between the left ventricle and the aorta.

• Align insonation beam with the flow
• Usually best from apical windows
• In eccentric jets, may be best from parasternal window, helped by color Doppler

 

Degree of the Aortic regurgitation by PHT:

• Mild - PHT < 500 msec
• Moderate - PHT 500-200 msec
• Severe - PHT < 200 msec

 

Apical 5 Chamber View. CW Doppler Control Volume in the LVOT (Left ventricular outflow tract). Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

Apical 5 Chamber View. CW Doppler. Degree of Aortic Regurgitation by PHT Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

 

 

 

ASE Guideline for Noninvasive Evaluation of Native Valvular Regurgitation

 

How to Simulate Assessment degree of Aortic Regurgitation by Vena Contracta Width (VCW)? >>>

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