Polymorphic Ventricular Tachycardia Associated with High-Dose Methadone Use

Figure 1

(a) 12-lead ECG revealed sinus rhythm with frequent PVCs. (b) Telemetry showed polymorphic premature ventricular contractions and R on T, and TdP was initiated. (c) QRS amplitude varied, and QRS complexes appeared to twist around the baseline, suggestive of TdP. (d) Self-termination of TdP.

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