Comparison of Squat-to-Stand Maneuver With Amyl Nitrite, Valsalva, and Exercise Stress Echocardiography in Inducing Latent Left Ventricular Outflow Obstruction in Hypertrophic Cardiomyopathy

Subjects will squat for 5 seconds and then stand. The squat-to-stand exercise will be done up to 10 times, and then immediately undergo echocardiographic imaging.

Subjects will inhale amyl nitrite prior to undergoing echocardiographic imaging. This is administered according to current laboratory protocol and is part of standard of care. This is an FDA-regulated drug that will be used as a control and will not be studied experimentally.

Subjects will undergo echocardiographic imaging while performing the Valsalva maneuver. This is according to current laboratory protocol and is part of standard of care.