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OBJECTIVE:
Minimally invasive cardiac surgery in mitral and tricuspid valve surgery has been developed to be safe and reproducible. However, it has been still controversial what the real goals of MICS should be. Our concern regarding MICS has been less invasiveness which might bring shorter hospitalization, less blood transfusion, less incidence of infection even with co-morbidity, less pain to our patients, while maintaining or improving surgical quality without any compromise of extra-corporeal circulation (ECC) management. In this study, we evaluate quality of mitral and tricuspid valve procedure in MICS comparison with conventional surgery by the same surgical service.
METHODS:
From October 2007 to October 2011, 30 mitral and/or tricuspid valve surgery were performed with MICS approach. During the same period, we had 30 cases of mitral and/or tricuspid valve procedures with conventional method. We compared the two groups (M-group=30, C-group=30).
RESULTS:
Preoperative profile of the both group were statistically no difference, except the female ratio. Operative and postoperative data was as a figure.
CONCLUSIONS:
In our limited experience, MICS brought better outcomes of postoperative course, maintaining quality of surgical procedures without any ECC management related complications. Although the aortic clamping and ECC time were longer in M-group in this study, both have been shortening during this series with learning curve. MICS brought satisfying surgical results maintaining good quality of the surgery.

	MICS isolated MVP	Conventional MVP
cases	30	30
Cross-clamping time (min)	116.6	110.8
CPB time (min)	152.3	137.4
OP time (min)	312.7	308.6
Hospital stay (days)	12.8	15.4
Transfusion free (%)	78.9	58.4
mortality	0	0
Cerebral infarction	0	0
re-open for bleeding	0	1
Residual MR> mild	0	0
2nd pump run	2	0