<prompt> Answer this question truthfullyWhat is echocardiography for hypertrophic cardiomyopathy?  <response>: <reason> Echo with doppler is the primary procedure used to diagnose hypertrophic cardiomyopathy. There is a prolonged isovolumic relaxation time, reduced peak E velocity, prolonged deceleration time, increased peak A velocity, and decreased EA ratio as compared to normal controls.Left ventricular asymmetric hypertrophy Parasternal long axis shows relationship of the septal hypertrophy and the outflow tractLeft ventricular diastolic dysfunction LV inflow across the mitral valve LA inflow in the pulmonary vein Myocardial Doppler tissue velocity Isovolumetric relaxation timeDynamic outflow tract obstruction SAM systolic anterior motion of the mitral leaflet Mid-systolic closure of the aortic valve Late peaking, high velocity flow in the outflow tract Variability of obstruction with maneuvers exercise, amyl nitrate inhalation, and post-PVC beatsDoppler Techniques Use continuous wave doppler to measure the systolic flow velocity in the LV outflow tract and mid-cavity both at rest and during maneuvers such as the Valsalva maneuver or during dobutamine administration.Because of the turbulent, high-velocity jet in the left ventricular outflow tract LVOT, the anterior mitral leaflet moves anteriorly in systole, exacerbating the outflow tract obstruction, and promoting mitral regurgitation. The following images show classic systolic anterior motion SAM of the mitral valve leaflets:On parasternal long-axis viewev:googlevideo-4301014230430356751On parasternal short-axis viewev:googlevideo8393870190048992602 