What should be done if there is no response to initial treatments for wide complex tachycardia?

• A. Repeat Amiodarone and consider defibrillation
• B. Administer diltiazem
• C. Start pacing
• D. Begin vasopressor infusion

Answer: (A)

Wide complex tachycardia is treated first with rhythm-controlling measures, and amiodarone is a common choice to terminate VT. If the initial dose doesn’t achieve rhythm control, the next prudent step is to repeat the amiodarone while continuing to monitor closely and prepare for potential electrical therapy. Defibrillation becomes a consideration if the rhythm persists or the patient deteriorates toward instability, since VT that does not respond to pharmacologic therapy may require a shock to restore a perfusing rhythm. In contrast, calcium channel blockers like diltiazem are not appropriate for wide complex tachycardia because they can worsen hemodynamics in VT and do not reliably convert it. Pacing or vasopressor infusions don’t address the underlying arrhythmia and are not the primary treatment when the rhythm remains wide and persistent after antiarrhythmic therapy.