What is the treatment sequence for unstable ventricular tachycardia?

The treatment sequence for unstable ventricular tachycardia begins with immediate intervention to stabilize the patient, which includes the critical steps outlined in the correct sequence. Initiating cardiopulmonary resuscitation (CPR) is essential to maintain circulation and oxygenation until further measures can be taken. Following CPR, defibrillation is the next crucial step because unstable ventricular tachycardia can quickly degenerate into more lethal arrhythmias, such as ventricular fibrillation, making immediate defibrillation necessary to restore a normal rhythm.

After defibrillation, if the patient remains unstable, intravenous (IV) epinephrine can be administered to support cardiac function and increase myocardial perfusion pressure. The use of amiodarone is recommended if the tachycardia persists despite defibrillation and epinephrine. Amiodarone is an antiarrhythmic medication that can help stabilize the heart rhythm.

This sequence reflects the prioritization of immediate lifesaving measures in acute cardiac emergencies, emphasizing the need for CPR and defibrillation as first-line interventions in the context of unstable ventricular tachycardia. The other choices list incorrect sequences or neglect key steps that are critical to the proper management of this life-threatening condition.