Key result
Electrical cardioversion and amiodarone trigger polymorphic VT in tachycardia-induced cardiomyopathy.
Case Report (n=1)
Highlights the rare risk of polymorphic ventricular tachycardia after electrical cardioversion for AF, particularly in patients with tachycardia-induced cardiomyopathy receiving amiodarone.
Raises caution for polymorphic VT with cardioversion plus amiodarone in tachycardia-induced cardiomyopathy; hypothesis-generating case requiring validation.
Ventricular arrhythmias after electrical cardioversion for AF are rare. Most of these arrhythmias are related to QT prolongation, resulting from marked and sudden slowing of heart rates, treatment with Class III antiarrhythmic drugs or other QT-prolonging medications, and the ventricular repolarisation remodelling effect of electrical cardioversion. A case of polymorphic ventricular tachycardia post-cardioversion of rapid AF in a patient with tachycardia-induced cardiomyopathy and the use of amiodarone is reported.
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Habib et al. (2025) conducted a case report in Atrial fibrillation with tachycardia-induced cardiomyopathy (n=1). Electrical cardioversion and amiodarone was evaluated on Polymorphic ventricular tachycardia. Electrical cardioversion and amiodarone use in a patient with rapid atrial fibrillation and tachycardia-induced cardiomyopathy resulted in polymorphic ventricular tachycardia.
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