RESULTS
Three hundred and sixty-six patients were included in the study. PFT were normal or mildly reduced in 190 patients (group 1) and moderately to severely reduced in 176 patients (group 2). All patients with pulmonary dysfunction in our study showed a restrictive pattern. Group 1 included more males and more patients who underwent CABG while Group 2 included more patients with preoperative stroke and more patients who underwent combined procedures, mitral valve procedures, tricuspid valve repair and MAZE procedure (table 1). Propensity matching identified 111 matched pairs in each group with balanced preoperative and operative characteristics (table 2).
Compared to Group 1, Group 2 had longer duration of mechanical ventilation [12 (7.5- 16) vs. 9 (6.5- 13) hours, p<0.001], higher postoperative Creatinine [111 (90- 142) vs. 105 (81- 128) µmol/dl, p=0.02] and higher hospital mortality (6.31% vs 0%, p=0.02). The rest of post-operative data and complications are illustrated in table 3.