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Europace Advance Access published online on May 10, 2006
Europace, doi:10.1093/europace/eul044
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© The European Society of Cardiology 2006. All rights reserved
Received November 21, 2004
Accepted February 27, 2006

Article

Documented exercise-induced cardiac arrest in a paediatric patient with hypertrophic cardiomyopathy

Alonso Pedrote 1 *, Francisco J. Morales 1, Lorena García-Riesco 1, and Francisco Errazquin 1

1 Arrhythmias Unit, Cardiology Service, Virgen del Rocío University Hospital, Manuel Siurot s/n, 41013, Sevilla, Spain

* To whom correspondence should be addressed.
Alonso Pedrote, E-mail: pedroteal{at}vodafone.es


  Abstract

A paediatric patient with hypertrophic cardiomyopathy (HCM) presented cardiac arrest due to ventricular fibrillation. Ventricular arrhythmias were not induced in an electrophysiological study, but an implantable cardioverter defibrillator (ICD) was implanted. Nine months later, the child experienced a recurrence of cardiac arrest during exercise, which was successfully treated with a defibrillator shock from the device. Analysis of the stored electrograms demonstrated ventricular fibrillation of abrupt onset following sinus tachycardia. The risk factors and the potential mechanism leading to recurrent cardiac arrest in this case are discussed. This report supports implantation of an ICD as a life-saving therapeutic approach not only for adults but also for children with HCM at high risk.

Keywords: Hypertrophic cardiomyopathy; Paediatric patient; Sudden death; Cardioverter defibrillator; Ventricular fibrillation.
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