Commotio cordis

Disruption of heart rhythm from a blow

Commotio cordis is a rare disruption of heart rhythm that occurs as a result of a blow to the area directly over the heart at a critical instant during the cycle of a heartbeat. The condition is 97% fatal if not treated within three minutes. This sudden rise in intracavitary pressure leads to disruption of normal heart electrical activity, followed instantly by ventricular fibrillation, complete disorganization of the heart's pumping function, and cardiac arrest. It is not caused by mechanical damage to the heart muscle or surrounding organs and is not the result of heart disease.

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