Key result
Intraoperative mapping in 20 patients with postoperative RBBB identified three distinct types of block (proximal, distal, and terminal) characterized by differences in right ventricular activation.
Population
20 patients who developed right bundle branch block during repair of congenital cardiac defects
Design
Case_series
Authors
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Caution against routine mapping adoption; leaves open whether distinguishing block types improves congenital heart surgery outcomes.
Observational (n=20)
Postoperative right bundle branch block after congenital heart surgery can result from proximal, distal, or terminal conduction block, each producing distinct right ventricular activation patterns.
Horowitz et al. (1980) conducted an observational in Postoperative right bundle branch block (RBBB) (n=20). Intraoperative epicardial and endocardial mapping was evaluated on Site of block and resultant pattern of ventricular activation. Intraoperative mapping in 20 patients with postoperative RBBB identified three distinct types of block (proximal, distal, and terminal) characterized by differences in right ventricular activation.
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