Successful combined aortic and mitral valve replacement with biological prostheses using the COMMANDO procedure under conditions of narrow valve rings and severe calcification via a mini-sternotomy approach: a case report
DOI:
https://doi.org/10.66636/gmj.v1.i3.a198Keywords:
acquired heart valve disease, aortic valve stenosis, mitral valve stenosis, COMMANDO procedure, aorto-mitral fibrous continuity reconstruction, prosthesis-patient mismatch, biological prosthesis, mini-sternotomy, minimally invasive cardiac surgery, case reportAbstract
Background: Simultaneous acquired aortic and mitral valve disease complicated by severe calcification and anatomically narrow rings poses a significant technical challenge in adult cardiac surgery. Implantation of small-sized prostheses under standard double-valve replacement risks prosthesis-patient mismatch (PPM), associated with elevated transprosthetic gradients, impaired regression of left ventricular hypertrophy, and reduced long-term survival. Reconstruction of the aorto-mitral fibrous continuity — the COMMANDO procedure — is the definitive surgical strategy to circumvent this limitation.
Case presentation: A 73-year-old female with severe biValvular calcification and critically narrow annular dimensions (aortic 21 mm; mitral 34 mm) underwent combined aortic and mitral bioprosthetic replacement via the COMMANDO technique through a partial upper mini-sternotomy. An autopericardial patch was used to reconstruct the intervalvular fibrosa and simultaneously enlarge both annuli. Hancock II bioprostheses were implanted (mitral 29 mm; aortic 25 mm). Cardiopulmonary bypass time was 150 minutes; cross-clamp time 135 minutes; intraoperative blood loss 200 mL. The heart resumed sinus rhythm spontaneously without inotropic support. The patient was extubated on postoperative day 1 and discharged on day 9. Follow-up echocardiography confirmed excellent prosthetic function (aortic PGmean 11 mmHg; mitral PGmean 3 mmHg; no paravalvular leak) with definitive avoidance of PPM (aortic iEOA 1.85 cm2/m2; mitral iEOA 2.5 cm2/m2).
Conclusion: The COMMANDO procedure executed through a partial upper mini-sternotomy is safe and technically feasible in elderly patients with severe biValvular calcification and narrow annular dimensions, enabling optimal prosthesis sizing, definitive PPM prevention, and excellent early haemodynamic outcomes.
Keywords: acquired heart valve disease; aortic valve stenosis; mitral valve stenosis; COMMANDO procedure; aorto-mitral fibrous continuity reconstruction; prosthesis-patient mismatch; biological prosthesis; mini-sternotomy; minimally invasive cardiac surgery; case report
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