Final answer:
The treatment for stable ventricular tachycardia with wide QRS that is irregular or polymorphic is to treat the underlying cause.
Step-by-step explanation:
Tachycardia with wide QRS that is irregular or polymorphic is usually caused by ventricular tachycardia. Ventricular tachycardia is a fast heart rhythm that originates in the ventricles, and it can be life-threatening. In this case, the treatment for stable ventricular tachycardia with wide QRS that is irregular or polymorphic is to treat the underlying cause.