The ECG findings include: Peaked T waves best seen in the precordial leads, shortened QT interval and, at times, ST segment depression CLINICAL PEARL: If you see an IVCD, think of hyperkalemia.

[8] This may augment transmural heterogeneity of repolarization intrinsic to ventricular myocardium and, as a consequence, prolong the QT and JT intervals on the electrocardiogram (ECG).

Conclusion: Q-T interval prolongation and TdP associated with the use of methadone are potentially fatal adverse effects. A thorough patient history and ECG monitoring are essential for patients ...

A normal ECG contains waves, intervals, segments and one complex, as defined below. Wave: A positive or negative deflection from baseline that indicates a specific electrical event. The waves on ...