Intraventricular conduction delay surgery

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mugilan Poongkunran M.B.B.S [2]

Asymptomatic patients with isolated IVCD and no underlying heart disease require no treatment. In symptomatic patients, with syncope and AV block may have a rhythm disturbance that requires a pacemaker. Given the dys-ynchrony that occurs with left ventricular contractility, cardiac resynchronization therapy in heart failure patients may be of benefit.

Permanent pacemaker may benefit patients with IVCD, if they have concomitant :

• Type 2 second-degree AV block
• Alternating bundle branch block
• Syncope not demonstrated to result from AV block or ventricular tachycardia
• Incidental finding at electrophysiological study of His-ventricular interval ≥100 msec
• Presence of neuromuscular disease
• Fascicular block with or without AV block and symptoms

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