Causes of irregularity in ventricular tachycardia

Causes of irregularity in ventricular tachycardia

Causes of irregularity in ventricular tachycardia:

Initial few beats in a ventricular tachycardia can be irregular.
Polymorphic ventricular tachycardia can be irregular.
The most important causes of irregularity in ventricular tachycardia are capture beats and fusion beats. Capture beats are sinus capture beats breaking the ventricular tachycardia occasionally. Fusion beats are caused by fusion of sinus capture beats with ventricular ectopic beats.