Type of the surgical procedure Group I (n=934) Group II (n=69)
CABG (n, %) CABG+AVR (n, %) CABG+MVR (n, %) CABG+AVR+MVR (n, %) AVR (n, %) MVR (n, %) AVR+MVR (n, %) 699 (74.8%) 26 (2.8) 25 (2.7%) 4 (0.4%) 59 (6.3%) 100 (10.7%) 21 (2.2%) 43 (62.3%) 5 (7.2%) 5 (7.2%) 0 8 (11.6%) 6 (8.7%) 2 (2.9%)