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A narrow QRS tachycardia and cannon A waves: What is the mechanism?

ABSTRACT: Regular narrow QRS tachycardia, particularly if well-tolerated, is usually considered a "benign" arrhythmia of a supraventricular origin. This case concerns an 82-year-old male with ischemic heart disease who presented with recurrent episodes of a narrow QRS tachycardia that was initially diagnosed and treated as atrial tachyarrhythmia. However, careful physical examination and ECG analysis established the correct diagnosis, and the patient was managed appropriately. Remarkably, the observation of irregular cannon A waves, and Lewis lead recording, confirmed atrioventricular dissociation during tachycardia and indicated its underlying mechanism.

SUBMITTER: Ali H

PROVIDER: S-EPMC6931751 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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A narrow QRS tachycardia and cannon A waves: What is the mechanism?

Ali Hussam H Epicoco Gianluca G De Ambroggi Guido G Lupo Pierpaolo P Foresti Sara S Cappato Riccardo R

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc 20161223 4

Regular narrow QRS tachycardia, particularly if well-tolerated, is usually considered a "benign" arrhythmia of a supraventricular origin. This case concerns an 82-year-old male with ischemic heart disease who presented with recurrent episodes of a narrow QRS tachycardia that was initially diagnosed and treated as atrial tachyarrhythmia. However, careful physical examination and ECG analysis established the correct diagnosis, and the patient was managed appropriately. Remarkably, the observation ...[more]

PMID: 28008694

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