[CME ECG 67/Answers: Arrhythmia on Exertion].

CME ECG 67/Answers: Arrhythmia on Exertion Abstract. Ventricular tachycardias are potentially life-threatening cardiac arrhythmias with a heart rate >100 beats/min, originating from the specific conduction system below the His or the ventricular myocardium. The morphology of the surface ECG can provide valid information about the underlying mechanism and the associated cardiac disorder. The according pathomechanism is of paramount importance for further management. This article is intended to provide an insight into the various causes and treatment options as well as the differential diagnosis of ventricular tachycardias.