Which management step is most appropriate for unstable ventricular tachycardia with a pulse?

Which management step is most appropriate for unstable ventricular tachycardia with a pulse?

• A. Synchronized cardioversion
• B. Defibrillation
• C. Magnesium sulfate infusion
• D. Beta-blocker infusion

Answer: (A)

When a patient has unstable ventricular tachycardia but still has a pulse, the priority is to rapidly restore a stable rhythm with synchronized electrical cardioversion. Synchronization allows the shock to be timed with the QRS complex, reducing the risk of delivering a shock during the vulnerable part of the cycle (the T wave) which could trigger deterioration to pulseless VT or cardiac arrest. Defibrillation is used when there is no pulse (pulseless VT or ventricular fibrillation) and is unsynchronized. Magnesium sulfate is mainly for torsades de pointes or certain electrolyte disturbances, not as the first-line move in this scenario. Beta-blockers aren’t ideal in an unstable patient because they can worsen hypotension and cardiac output.

When a patient has unstable ventricular tachycardia but still has a pulse, the priority is to rapidly restore a stable rhythm with synchronized electrical cardioversion. Synchronization allows the shock to be timed with the QRS complex, reducing the risk of delivering a shock during the vulnerable part of the cycle (the T wave) which could trigger deterioration to pulseless VT or cardiac arrest. Defibrillation is used when there is no pulse (pulseless VT or ventricular fibrillation) and is unsynchronized. Magnesium sulfate is mainly for torsades de pointes or certain electrolyte disturbances, not as the first-line move in this scenario. Beta-blockers aren’t ideal in an unstable patient because they can worsen hypotension and cardiac output.