ObjectiveTo explore the clinical effect of complete thoracoscopic mitral valve replacement in the treatment of simple mitral valve lesions. MethodsSixty patients with simple mitral valve lesions were selected and divided into thoracoscopic group (n=20) and open group (n=40) according to different operation modes. Patients in the thoracoscopic group underwent complete thoracoscopic mitral valve replacement, while patients in the open group were treated with conventional open mitral valve replacement. The conditions of operation, complications, and pulmonary function were compared between the two groups. ResultsCompared with the open group, the thoracoscopic group yielded shorter operation time, ICU stays, postoperative hospital stays, and less intraoperative blood transfusion volume, postoperative thoracic drainage volume, as well as lower VAS scores and complication incidence (all P＜0.05); but there were no statistically significant differences in the time of cardiopulmonary bypass, aorta occlusion and postoperative ventilator assistance between the two groups (all P＞0.05). One month after surgery, the forced vital capacity (FVC), forced expiratory volume in one second (FEV1) and peak expiratory flow (PEF) of the two groups decreased significantly compared with those before surgery (all P＜0.05), but there were no statistically significant differences in the indicators mentioned above between the two groups (all P＞0.05). ConclusionComplete thoracoscopic mitral valve replacement is a safe and reliable method for the treatment of simple mitral valve lesions with little trauma and little impact on the patient′s body.

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