The Marathon Runner with a Failing Heart

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He was 33, fit, and trained for half-marathons. One day, during a jog, he fainted. He was rushed to me with bradycardia.

An echocardiogram showed a dilated cardiomyopathy with an ejection fraction of 25%. No viral prodrome. Genetic testing later revealed a titin mutation.

He went from marathoner to patient in a week—but adapted with grace. Today, he’s a motivational speaker for young people with heart failure.


The Lesson Learned

Physical fitness doesn’t equal cardiac health. Screen young athletes with unexplained symptoms. Genetic cardiomyopathies can hide under the surface of strength.

Watch The Complete Interview

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