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Updated: Aug 20, 2026

Surgical Porcine Model of Chronic Myocardial Ischemia Treated by Exosome-laden Collagen Patch and Off-pump Coronary Artery Bypass Graft
Published on: September 15, 2023
Spontaneous atrioventricular groove disruption during off-pump coronary artery bypass grafting
Jennifer S Lawton1, Seema P Deshpande, Paul B Zanaboni
1Department of Cardiothoracic Surgery, Washington University in St. Louis, St. Louis, Missouri 63110, USA. lawtonj@msnotes.wustl.edu
Abstract:
Atrioventricular groove tear or disruption is a disastrous and technically challenging complication after mitral valve replacement surgery. This report details the untimely spontaneous occurrence of an atrioventricular tear during manipulation of the heart for off-pump coronary artery bypass grafting and its successful repair. Significant distortion of the mitral annulus and elevation of pulmonary artery pressures in the beating heart likely contributed to the spontaneous tear.
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