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Wrist and Hand Conditions

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Commotio cordis or cardiac<br />

concussion<br />

Commotio cordis is an electrophysiological event<br />

caused by precordial chest impact that occurs in<br />

individuals free from structural cardiac disease.<br />

The mechanism of SCD appears to be ventricular<br />

fibrillation that is produced when the chest impact<br />

is delivered within a narrow, electrically vulnerable<br />

period of the cardiac cycle.<br />

Specifically, the susceptible time is during<br />

repolarization, 10–30 msec before the peak of the<br />

T wave.<br />

Resuscitation of these victims is possible with<br />

prompt CPR <strong>and</strong> defibrillation.

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