Abstract
Differentiation of ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with aberrancy or a preexisting bundle branch block is difficult, 1–4 particularly if 1:1 retrograde atrioventricular (AV) conduction is present. 4 We describe a previously unreported and potentially diagnostic effect of verapamil when administered in the management of a wide QRS complex tachycardia.
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