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Minimally invasive mitral valve surgery through right thoracotomy in patients with patent coronary artery bypass grafts

Department of Adult Cardiac Surgery, ‘G. Pasquinucci’ Heart Hospital, IFC-CNR, Via Aurelia Sud 54100, Massa, Italy

*Corresponding author. Tel.: +390585493604; fax: +390585493614.

E-mail address: michelem{at}ifc.cnr.it (M. Murzi).

We report our institutional experience, with 25 consecutive patients with patent coronary artery bypass grafts (71.8±12.7 years), who underwent video-assisted minithoracotomic approach for mitral valve surgery. The surgical technique includes: right minithoracotomy, femoral cannulation and hypothermic ventricular fibrillation. Mean preoperative EuroSCORE was 10.2±2.4 and mean ejection fraction was 45±9%. Operative mortality was 4% (1/25). No patient required a conversion to sternotomy. Procedures performed were: mitral valve repair in 15 patients (60%), replacement in 10 (40%) and associated tricuspid repair in seven (28%). Mean blood transfusion was 1.2 package/patient. No cardiological, neurological, vascular and wound complications were observed. Postoperative major morbidity includes: severe pulmonary dysfunction in two patients (8%) and acute renal failure in one (4%). Mean ICU and hospital stay were 3.4±2.9 and 10.6±7.9 days. Echocardiographic follow-up (22.8±14.9 months) revealed trace or mild mitral valve regurgitation in all the mitral repair patients. When interrogated, all the surviving patients preferred the minithoracotomic approach rather than the sternotomy. In conclusion, minimally invasive right thoracotomy can be safely performed in patients with functioning coronary bypass grafts requiring mitral valve operation. Low blood transfusion, the avoidance of deep wound infection and the high patient satisfaction are the main advantages of this approach.

Key Words: Minimally invasive surgery; Mitral valve; Reoperation; CABG; Arterial grafts