Which action represents the first step in managing unstable narrow complex tachycardia?

• A. Initiate analgesia and synchronized cardioversion
• B. Expedite transport only
• C. Expedite transport and consider analgesia
• D. Administer diltiazem IV

Answer: (C)

In unstable narrow complex tachycardia, the top priority is rapid stabilization and getting the patient to definitive care. Treating the immediate rhythm problem and the patient’s condition takes precedence over giving drugs that require stability or delaying transport. Expediting transport to a facility capable of definitive rhythm control is the most critical first step, and you can consider analgesia if it won’t delay the critical interventions. This approach avoids delaying synchronized cardioversion, which is the appropriate treatment for an unstable patient, while also offering comfort measures without slowing down care.

Diltiazem IV is not the first move here because giving a calcium channel blocker in an unstable patient can worsen hypotension and hemodynamic compromise. Analgesia alone wouldn’t resolve the rhythm, and initiating cardioversion immediately is the definitive action—but the first step framed in these options emphasizes rapid transport with the option for analgesia rather than delaying for pharmacologic termination.