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Updated: Feb 25, 2026

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Termination of a long RP supraventricular tachycardia by carotid sinus massage
Mohammed A M Ahmed1, Lauren M Clark2, Andrew Mardell1
1Libin Cardiovascular Institute of Alberta, Cumming School of Medicine, University of Calgary, Calgary,Alberta, Canada.
Abstract:
Carotid sinus massage is a useful diagnostic and therapeutic maneuver in patients with supraventricular tachycardia. Abrupt tachycardia termination with carotid sinus massage typically indicates a mechanism dependent on the atrioventricular node. Here, we present the case of a 79-year-old patient presenting with a long-RP supraventricular tachycardia terminated with carotid sinus massage that was proven invasively to be due to a focal atrial tachycardia. We discuss mechanistic explanations for this unusual phenomenon and review the literature.
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