Morphology of Atrial Myocardial Extensions Into Human Caval Veins

Abstract
Background— Atrial fibrillation (AF) may be triggered from arrhythmogenic foci originating from atrial muscular sleeves that extend into the caval veins (CVs). The aim of this anatomic study was to evaluate both the extent and arrangement of atrial myocardial fibers in CVs in subjects with and without a history of AF.

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