Why the study?
Does intravenous verapamil suppress ventricular tachycardia in patients with chronic recurrent VT of different electrophysiologic mechanisms?
Population
21 patients with chronic recurrent ventricular tachycardia (VT)
Comparison
Verapamil intravenous infusion vs Baseline (before verapamil infusion)
Design
Case_series
Authors
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Verapamil response may identify triggered-activity VT; hypothesis-generating and should not yet change practice.
Does intravenous verapamil suppress ventricular tachycardia in patients with chronic recurrent VT of different electrophysiologic mechanisms?
Intravenous verapamil is effective in suppressing ventricular tachycardia caused by triggered activity related to delayed afterdepolarizations, but not VT caused by reentry or automaticity.
Sung et al. (1983) studied this question.
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