The other morphology has an R larger than the R' in lead V1 indicating a ventricular origin. Note the pause, one sinus beat, then the resumption of the bidirectional ventricular tachycardia.

Ventricular tachycardia can occur with many variations of the QRS morphology, depending on where the arrhythmia originates, which sometimes makes diagnosis on ECG challenging. Below are two ...

A 12-lead electrocardiogram ... myocarditis — which can also cause left ventricular systolic impairment, hypotension, and nonsustained ventricular tachycardia — or an acute necrotizing ...

As noted above, the precordial leads are unreliable, compromising by their inclusion calculations deriving from the set of 12 ECG leads. It appears, therefore, that using sums of data from the six ...

CV evaluation included history, PE, 12-lead and exercise ECG ... and systemic hypertension in 11 (4%). In addition, ventricular (polymorphic, couplets or non-sustained ventricular tachycardia) or ...

Reproducibility of exercise-induced ventricular arrhythmia/PVBs on serial EST or ECG Holter. CV, cardiovascular; EST, exercise stress testing; LBBB, left bundle branch block; NSVT, non-sustained ...