Premature Atrial Contractions Originating from the Inferior Vena Cava: A Rare Arrhythmogenic Source Amenable to Ablation

Introduction

Premature atrial contractions (PACs) are common cardiac arrhythmias that are typically associated with trigger mechanisms. PACs originating from pulmonary veins (PVs) are considered important triggers for atrial fibrillation (AF), and pulmonary vein isolation (PVI) has been widely used as a treatment. However, the inferior vena cava (IVC) is generally regarded as an electrically quiescent region, and studies of ectopic discharges originating from the IVC are relatively rare. In this study, we present a case of PACs originating from the IVC, aiming to provide new insights into the pathophysiological mechanisms of these arrhythmias.

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