264 Ch 263. Supraventricular Tachycardia (SVT)

Narrow-complex tachycardia (QRS < 120 ms typically); AVNRT (~60% of SVT), AVRT (WPW, 30%), AT (atrial tachycardia), AFL (atrial flutter); vagal maneuvers + adenosine for acute termination; catheter ablation = curative for recurrent symptomatic; WPW + AF: avoid AV nodal blockers (use procainamide or cardioversion)。