This case report describes a rare instance of calcium-triggered short-coupled polymorphous ventricular tachycardia that was successfully mapped and ablated.
May support ablation consideration in rare calcium-triggered short-coupled PVT; leaves open generalizability and mechanism confirmation.
We describe a case of an 18-year-old man presenting with syncope found to have short-coupled premature ventricular complexes (PVCs) with subsequent nonsustained polymorphous ventricular tachycardia (PVT). Electrophysiology testing revealed premature PVCs and PVT provoked by calcium but not isoproterenol. It was noted that the earliest triggered event appeared to arise from ventricular muscle with subsequent involvement of the fascicles and these areas were ablated. The potential mechanisms for calcium triggering of these arrhythmias are discussed.
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Yeh et al. (2009) studied this question.
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