Hypertrophic cardiomyopathy (HCM) is the most common genetic heart condition you may have never heard about, a sometimes-elusive chronic disease that can have no symptoms or cause symptoms that mimic other conditions, such as asthma.
With HCM, the walls of your heart thicken over time, potentially impairing the blood flow in and out of your heart. It can put you at risk for dangerously abnormal heart rhythms, heart failure, and other cardiac conditions. In addition, it’s the leading cause of sudden cardiac death in people younger than 30, and the leading cause of cardiac arrest in young athletes.