Aortic valve replacement is a commonly performed surgery for severe Aortic stenosis. Atrioventricular groove (AVG) hematomas range from simple hematomas to complex AVG disruptions that cause a frank rupture with massive bleeding and subsequent mortality. AVG hematoma and disruption is a rare and dreaded complication encountered in less than 2% of patients undergoing mitral valve replacement (MVR). When it occurs, it necessitates going back on cardiopulmonary bypass, explanting the valve, pericardial patch reconstruction of the AV groove, and then prosthesis reimplantation. Mortality sharply rises if this injury goes unrecognized before sternal closure. We describe the successful management of rupture of the posterior atrioventricular groove caused iatrogenically while performing aortic valve replacement.