Balloon-expandable Myval valve-in-valve transcatheter aortic valve implantation with bailout left main coronary artery chimney stenting: a case report

This case highlights the feasibility, safety, and procedural effectiveness of the Myval balloon-expandable transcatheter heart valve in a redo transcatheter aortic valve implantation setting. It also underscores the importance of anatomical evaluation, risk stratification, and pre-emptive coronary protection in complex structural heart interventions. The successful use of the chimney technique reinforces its role in mitigating life-threatening coronary occlusion during valve-in-valve procedures. This report contributes to the growing evidence supporting the use of next-generation transcatheter heart valves for complex redo transcatheter aortic valve implantation scenarios and expands the clinical applicability of Myval in high-risk cases.