Webchat Transcripts - Questions and Answers with a Physician

Hypertrophic cardiomyopathy (HCM) is a complex type of heart disease marked by thickening of the heart muscle, left ventricular stiffness, mitral valve changes and cellular changes. HCM affects an estimated 600,000 to 1.5 million Americans, or one in 500 people. HCM is the most common cause of sudden cardiac death in people under age 30 and may be best known for its role in cardiac arrest and subsequent death in some young professional athletes.

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Reviewed: 08/18