The VAS score at 3 days, 7 days, and 1 month after surgery was 7, 7 ± 1, 2; 5, 2 ± 1, 5; 0, 9 ± 1, 1 in sternotomy group and 6, 6 ± 1, 6; 3, 8 ± 1, 5; 1, 7 ± 0, 9 in mini invasive group, respectively.