The leading cause of sudden death in American athletes is a genetic disorder called hypertrophic cardiomyopathy, which by some estimates affects roughly one in 500 people. Like weeds that overrun an unkempt yard, the heart muscle fibers proliferate rapidly and in a disorganized manner, often leading to a tripling or quadrupling in heart size during adolescence (see a picture here). People with HCM usually have no idea this is happening until they’re exercising one day and the electrical system in the heart suddenly fails. The heart takes on the appearance of a bag of worms struggling to get free (a problem called ventricular fibrillation), and cardiac arrest occurs.
read the entire MSN article here by Darshak Sanghavi
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