A stable patient has an irregular wide-complex tachycardia with beat-to-beat QRS variation, rates to 240/min and delta waves on a previous ECG. Which

Question

A stable patient has an irregular wide-complex tachycardia with beat-to-beat QRS variation, rates to 240/min and delta waves on a previous ECG. Which pharmacologic strategy is appropriate?

Accepted Answer

Use IV procainamide while preparing synchronized cardioversion

Answer

Use IV digoxin to increase accessory-pathway refractoriness

Answer

Use IV metoprolol to reduce the shortest pre-excited interval

Answer

Use IV diltiazem to slow conduction through the AV node

Answer

Use IV adenosine to identify the underlying atrial rhythm

Stable monomorphic ventricular tachycardia — RCPSC EM MCQ

A stable patient has an irregular wide-complex tachycardia with beat-to-beat QRS variation, rates to 240/min and delta waves on a previous ECG. Which pharmacologic strategy is appropriate?