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Updated: Aug 6, 2026

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
Published on: December 11, 2017
Post-Transcatheter Aortic Valve Implantation QRS Interval Alternans: What Is the Mechanism?
Oznur Keskin1, Ahmet Taha Sahin2, Yakup Alsancak1
1Department of Cardiology, Necmettin Erbakan University, School of Medicine, Konya, Turkiye.
Abstract:
Alternating bundle branch block is a significant conduction abnormality observed after transcatheter aortic valve replacement. This electrocardiographic finding indicates progressive conduction system disease, often on a background of preexisting conduction disturbances (eg, right bundle branch block). However, the presence of alternating fascicular block is very rare. The presence of alternating fascicular blocks suggests an increased risk for complete heart block, frequently necessitating permanent pacemaker implantation to prevent life-threatening arrhythmias.
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