4.15 Differentiating the Doppler envelope of AS, MR, TR, HOCM

In this episode, we review how to differentiate the Doppler signals of aortic stenosis (AS), mitral regurgitation (MR), tricuspid regurgitation (TR), and left ventricular outflow tract obstruction (LVOTO) in hypertrophic obstructive cardiomyopathy (HOCM) – as all four of these occur during the systolic phase of the cardiac cycle. Which jets are separated by the isovolumic contraction time (IVCT) and the isovolumic relaxation time (IVRT)? Which jets can blend into each other across cardiac cycles? Which jets are parabola-shaped, and which are dagger-shaped? How can the point of velocity aliasing on color Doppler distinguish between valvular AS from subaortic membrane? Tune in for answers to these questions.

Difficulty Level: Advanced

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