Medicine All of the following features can differentiate between ventricular tachycardia and supraventricular tachycardia except: A QRs < 0.14 seconds B Ventricular rate > 160/min C Variable first hea sound D Relieved by carotid sinus massage 💡 Explanation All of the following features can differentiate between ventricular tachycardia and supraventricular tachycardia except: ✓ Correct Answer: B. Ventricular rate > 160/min