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Amiodarone-induced 2 to 1 atrioventricular block in association with prolongation of the QT interval

Published online by Cambridge University Press:  24 May 2005

Colin J. McMahon ,
William P. Laird  and
Arnold L. Fenrich
Colin J. McMahon
Affiliation:
Lillie Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
William P. Laird
Affiliation:
Lillie Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
Arnold L. Fenrich
Affiliation:
Lillie Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
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Abstract

The potential for development of 2 to 1 atrioventricular conduction in children with prolongation of the QT interval has been previously reported secondary to electrolytic disturbances. We report here a child who developed 2 to 1 atrioventricular conduction with prolongation of the QT interval following treatment with amiodarone for refractory supraventricular tachycardia. We highlight the importance of electrocardiographic monitoring to assess for those at risk of amiodarone toxicity, which may be manifested by prolongation of the QT interval and the simultaneous loss of atrioventricular conduction, and of equal importance the need for prompt conversion to an alternative anti-arrhythmic agent.

Keywords

Electrocardiographyatrioventricular conductiondrug treatment
Type
Brief Report
Information
Cardiology in the Young , Volume 13 , Issue 3 , June 2003 , pp. 305 - 307
Copyright
© 2003 Cambridge University Press

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