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Left bundle branch block in infants with dilated cardiomyopathy conveys a poor prognosis

Published online by Cambridge University Press:  19 August 2008

James F. Cnota
Department of Pediatrics, Steele Memorial Children's Research Center, College of Medicine, University of Arizona, Tucson, AZ, USA
Ricardo A. Samson*
Department of Pediatrics, Steele Memorial Children's Research Center, College of Medicine, University of Arizona, Tucson, AZ, USA
Ricardo A. Samson, MD, Department of Pediatrics, Arizona Health Sciences Center, 1501 N. Campbell Avenue, PO Box 245073, Tucson, AZ 85724-5073, USA. Tel: 520-626-6508; Fax: 520-626-6571


We describe three infants < 3 months of age seen consecutively with dilated cardiomyopathy who presented initially with left bundle branch block on the surface 12-lead electrocardiogram. Each infant subsequently had a poor outcome: two died and one required heart transplantation. These results suggest that the presence of left bundle branch block on the 12-lead electrocardiogram conveys a poor prognosis in infants with dilated cardiomyopathy.

Original Articles
Copyright © Cambridge University Press 1999

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