Conclusions
In conclusion, the perioperative results of mitral valve surgery for secondary mitral valve regurgitation with poor left ventricular function were good. The present results suggest that open mitral valve surgery could be appropriate for secondary mitral valve regurgitation with poor cardiac function. However, since the clinical frailty scale score affects long-term survival significantly, operative indications should be considered carefully in patients with a high clinical frailty scale score.
Further accumulation of data is mandatory to determine which modality should be used for patients with secondary mitral regurgitation and poor left ventricular function.