Administer synchronized cardioversion to the patient with ventricular tachycardia (VT) because they have a pulse and are unstable, and perform immediate unsynchronized defibrillation on the patient with pulseless ventricular fibrillation (VF) to restore a perfusing rhythm.

Cardioversion should be used for the patient with pulseless VF as it delivers an asynchronous shock to restore rhythm immediately.

Both patients require defibrillation in order to deliver synchronized shock.

Use defibrillation for both patients because any ventricular dysrhythmia requires an immediate asynchronous shock regardless of pulse status.