Commissural Prolapse: Combining the Best From Two Aortic Valve Repair Techniques.

Aortic valve commissural avulsion is an exceptionally rare and often underdiagnosed cause of aortic regurgitation. We report a 30-year-old male with severe chronic aortic regurgitation and a mildly dilated aortic root, in whom intraoperative inspection revealed spontaneous avulsion of the right-noncoronary commissure. The patient underwent valve-sparing aortic root replacement using a combined approach: remodelling root replacement with external annuloplasty according to the Lansac technique, and targeted commissural reinforcement based on David principles. Postoperative and 6-month imaging showed stable root geometry, good leaflet coaptation, mild central regurgitation, and improved left ventricular function. This case highlights the diagnostic value of multimodality imaging and illustrates that tailored application of established valve-sparing techniques can achieve durable repair in rare commissural lesions.