Journal
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY
Volume 23, Issue 8, Pages 1308-1310Publisher
FUTURA PUBL CO
DOI: 10.1111/j.1540-8159.2000.tb00951.x
Keywords
cardiomyopathy; radiofrequency ablation; supraventricular tachycardia; left ventricular free-wall pathway
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Incessant supraventricular tachycardia leading to reversible cardiomyopathy has been reported. Cardiomyopathy usually only develops after prolonged episodes of tachycardia at a significant heart rate. Left ventricular free-wall pathways rarely cause fast and incessant tachycardia. Therefore cardiomyopathy has not been reported with left ventricular free-wall pathway-mediated supraventricular tachycardia. We report on two cases of left ventricular free-wall-mediated supraventricular tachycardia leading to reversible cardiomyopathy after radiofrequency ablation. These cases illustrate the difficulty in diagnosing tachycardia-mediated cardiomyopathy, as the tachycardia may be clinically silent. In addition, they emphasize the importance of making this diagnosis, as the cardiomyopathy is reversible.
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