They also found that the abnormal cardiac rhythm events reported occurred over a large range of doses. Maremmani and associates [48] conducted a study with 83 patients addicted to heroin on ...

A prolonged QT interval has a variety of causes and can be a very serious ECG finding, as it may lead to the potentially fatal arrhythmia polymorphic ventricular tachycardia (Torsades de Pointes).