Auto-Pericardial Mitral Valve Implantation: A Pilot Study

Abstract

Introduction: Developing nations continue to grapple with rheumatic heart disease, particularly in the young. There is a need for an alternative to prosthetic mitral valve replacement in irreparable mitral valves, which avoids the need for anticoagulation and risks of thromboembolism.

Methods: Twelve (12) patients with irreparable severe mitral valve disease underwent auto-pericardial mitral valve implantation from August 2020 to February 2021. The mitral valve leaflets were excised. Autologous pericardium treated with 0.5% glutaraldehyde for 8 minutes was fashioned into anterior and posterior mitral leaflets as per the dimensions on an indigenously designed template based on the studies by Ranganathan and Lam. The pericardial leaflets were sutured onto an appropriately sized mitral annuloplasty ring. The ring with the leaflets was implanted onto the mitral annulus. The leaflets were supported with neo-chordae prepared with Gore-Tex (W L Gore and Associates, Inc. Newark, DE, USA) and polyester sutures to mimic a repaired mitral valve in its structure and dynamics.

Results: The mean cross-clamp time was 138±21.7 minutes. None of the patients required re-exploration. On the third postoperative day, a mean mitral valve orifice area of 3±0.47 cm and mean mitral valve gradient of 2±1.04 were observed. None of the patients had any more than 1+ mitral regurgitation. None of them have required a re-intervention for mitral insufficiency to date.

Discussion: Auto-pericardial mitral valve re-implantation is a safe and effective procedure for severe, irreparable, mitral valve pathologies. However, the mid-term and long-term results need to be compared with conventional mitral valve replacement with a prosthetic valve in a randomised controlled trial.

Keywords: Auto-pericardial mitral valve; Biological mitral valve; Irreparable mitral valve; Mitral valve replacement; Rheumatic heart disease.