The rate of LCOS after heart surgery (n=107) Time Low cardiac output syndrome (No) Low cardiac output syndrome (Yes) p - value n% n% POD 1 94 87.9 13 12.1 < 0.05 POD 2 98 91.6 9 8.4 < 0.05 POD 3 104 97.2 3 2.8 < 0.05 POD 4 107 100.0 0 0.0 - POD 5 107 100.0 0 0.0 - POD (ingeneral) 82 76.6 25 23.4 < 0.05 14 Comment: The patients with LCOS at postoperative day 1 (POD 1), POD 2, POD 3 were 13 cases (12.1%), 9 cases (8.4%), 3 cases (2.8%).