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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

To the Editor: Dr Maron and colleagues¹ reported that ventricular tachycardia/fibrillation was identified in 36 of 82 cases of commotio cordis and that most were successfully resuscitated by an external defibrillator.

Time is of the essence in treating this lethal tachyarrhythmia, and external defibrillators are often unavailable. Thumpversion,² or a manual thump to the precordium, has been shown to be effective in terminating both ventricular tachycardia and ventricular fibrillation.³ It might seem to be a paradox to treat commotio cordis, which is caused by a chest blow, by a second precordial thump. Caldwell et al,⁴ however, reported that thumpversion was efficacious in a prospective study of 5000 medical-surgical patients. Therefore, a chest blow is apparently a double-edged sword: it can cause sudden ventricular arrhythmias but also terminate them.

A similar prospective study of thumpversion in commotio cordis would thus be an important study because thumpversion could be applied instantaneously and . . . [Full Text of this Article]

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RELATED LETTER

Clinical Profile and Spectrum of Commotio Cordis
Barry J. Maron, Thomas E. Gohman, Susan B. Kyle, N. A. Mark Estes III, and Mark S. Link
JAMA. 2002;287(9):1142-1146.
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