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Purpose  To analyze the efficacy of minimally invasive beating heart technique for mitral valve surgery in the cardiac patients with previous sternotomy and giant left ventricle.    Methods  Eighty cardiac patients with previous sternotomy and giant left ventricle according to the diagnostic criteria that left ventricular end diastolic diameter (LVEDD) was ≥70 mm, who underwent mitral valve surgery at our center from January 2006 to January 2019 were analyzed. We divided all patients into minimally invasive beating heart technique group ( n  = 30) and conventional median resternotomy arrested heart technique group ( n  = 50) according to the surgical methods. Preoperative, intraoperative, and postoperative variables were compared between two groups.    Results  Minimally invasive beating heart technique compared to the conventional median resternotomy arrested heart technique for mitral valve surgery in the cardiac patients with previous sternotomy and giant left ventricle had significant differences in operation time( P  = 0.002), cardiopulmonary bypass (CPB) time( P  < 0.001), intraoperative blood loss( P  < 0.001), postoperative transfusion ratio( P  = 0.01), postoperative transfusion amount( P  < 0.001), postoperative drainage volume( P  = 0.001), extubation time( P  = 0.04), intensive care unit (ICU) stay time( P  = 0.04) and postoperative hospital stay time( P  < 0.001), but no significant differences in re-exploration for bleeding, postoperative 30-day mortality, postoperative complications and 6 months postoperative echocardiographic parameters.    Conclusions  Using the method of minimally invasive beating heart technique for mitral valve surgery in the cardiac patients with previous sternotomy and giant left ventricle is effective and reliable, meanwhile reduce the operation time and CPB time, decrease the transfusion ratio and transfusion amount, shorten postoperative ICU stay and hospital stay time, promote the early extubation so that accelerate the patients’ early recovery.  All of these show a benefit of minimally invasive beating heart technique compared to conventional median resternotomy arrested heart technique.

Minimally invasive beating heart technique for mitral valve surgery in patients with previous sternotomy and giant left ventricle