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Sustained monomorphic ventricular tachycardia: Clinical manifestations, diagnosis, and evaluation

Leonard I Ganz, MD, FHRS, FACC
Alfred Buxton, MD
Section Editor
Isabelle C van Gelder, MD, PhD, FESC
Deputy Editor
Brian C Downey, MD, FACC


Sustained monomorphic ventricular tachycardia (SMVT) is defined by the following characteristics:

A regular wide QRS complex (≥120 milliseconds) tachycardia at a rate greater than 100 beats per minute

The consecutive beats have a uniform and stable QRS morphology

The arrhythmia lasts ≥30 seconds or causes hemodynamic collapse in <30 seconds

In patients with significant coronary heart disease (CHD) or other structural heart disease, a wide QRS complex tachycardia (WCT) should be considered to be ventricular tachycardia until proven otherwise. (See "Approach to the diagnosis of wide QRS complex tachycardias".)

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Literature review current through: Nov 2017. | This topic last updated: Dec 08, 2016.
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