Data Collection and Variable Definition
Baseline information, operative and postoperative data were distracted
from the inpatient records system. The examination results closest to
surgery date were recorded. Low cardiac output syndrome was defined as
supported by large doses of cardiovascular active drugs and mechanical
equipment including intra-aortic balloon pump and extracorporeal
membrane oxygenation. Respiratory complications were considered if any
of the following conditions were met: 1) lung infection and pathogenic
culture positive twice; 2) ventilation support more than 7 days when the
heart function was good. Poor wound healing referred to the need for
debridement.