// AEMT Question · Cardiology
A patient with a heart rate of 180/min, narrow QRS, and regular rhythm is most likely in:
A. Atrial fibrillation
B. Ventricular tachycardia
C. Supraventricular tachycardiaCorrect
D. Third-degree AV block
// Rationale
Narrow-complex regular tachycardia at ~150–250/min is classic supraventricular tachycardia (SVT).