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Sustained monomorphic ventricular tachycardia: Diagnosis and evaluation

INTRODUCTION

Sustained monomorphic ventricular tachycardia (SMVT) is a potentially life-threatening arrhythmia which can be differentiated from supraventricular tachycardia, nonsustained ventricular tachycardia, and polymorphic ventricular tachycardia by the following characteristics:

Wide QRS complex tachycardia (WCT) with QRS complex duration >0.12 seconds and a rate of greater than 100 beats per minute

Atrioventricular (AV) dissociation

Uniform and stable QRS morphology, although there may be subtle changes in QRS complex morphology and in the ST-T waves

Duration of at least 30 seconds or development of hemodynamic compromise

                  

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Literature review current through: Nov 2014. | This topic last updated: Aug 29, 2014.
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