Final answer:
Ventricular tachycardia is a condition characterized by a fast, irregular heartbeat originating from the ventricles. It can be caused by hyperkalemia and the priority intervention is defibrillation. Epinephrine is used to support the heart until defibrillation can be performed.
Step-by-step explanation:
Ventricular tachycardia (VT) is a medical condition characterized by a fast, irregular heartbeat that originates from the ventricles of the heart. It can be caused by various factors, including hyperkalemia, which is high potassium levels in the blood. The priority intervention for ventricular tachycardia is defibrillation, which involves the use of special paddles to deliver an electrical shock to the heart in an attempt to restore a normal heartbeat. In the given scenario, the administration of epinephrine is aimed at improving the heart's pumping ability and supporting the patient until defibrillation can be performed.