pulmonary vein isolation
An ablation technique that electrically isolates the pulmonary veins from the left atrium to treat atrial fibrillation.
Full Definition
Pulmonary vein isolation (PVI) is the cornerstone catheter ablation technique for treating atrial fibrillation, involving the creation of circumferential lesions around the pulmonary vein ostia to electrically disconnect these structures from the left atrium. The pulmonary veins are the most common source of triggers that initiate atrial fibrillation episodes. The procedure uses radiofrequency energy, cryoballoon technology, or other energy sources to create transmural lesions that block electrical conduction between the pulmonary veins and left atrial myocardium. Complete isolation is confirmed by demonstrating entrance and exit block using specialized catheters. PVI has become the standard first-line ablation approach for both paroxysmal and persistent atrial fibrillation.
Usage
Usage note: Abbreviate as PVI; specify completeness and method when documenting procedures.
In Context
- "Complete pulmonary vein isolation was achieved in all four pulmonary veins during the procedure." — Ablation procedure report
- "PVI remains the foundation of catheter ablation strategies for atrial fibrillation." — Review article