The evaluation of levosimendan in patients with acute myocardial infarction related ventricular septal rupture undergoing cardiac surgery: a prospective observational cohort study with propensity score analysis

Study objective The purpose of the present study was to evaluate the efficacy of levosimendan in patients with acute myocardial infarction related ventricular septal rupture (AMI-VSR) underwent cardiac surgery. Design Prospective observational cohort study with propensity score analysis. Patients There were 261 patients with AMI-VSR in our study. After 1:1 propensity matching, 106 patients (53 levosimendan and 53 control) were selected in the matched cohort. Interventions None. Measurements Patients who received levosimendan were assigned to the levosimendan group (n = 164). The patients who were not received were levosimendan assigned to the control group (n = 97). The levosimendan was initiated immediately after cardiopulmonary bypass. Then, it has been maintained during the postoperative 3 days. The poor outcomes were identified as follows: death and postoperative complications (postoperative stroke, low cardiac output syndromeneeded mechanical circulatory support after surgery, acute kidney injury (>= stage III), postoperative infection or septic shock, new developed atrial fibrillation or ventricular arrhythmias). Main results Before matching, the control group had more length of ICU stay (6.69 +/- 3.90 d vs. 5.20 +/- 2.24 d, p < 0.001) and longer mechanical ventilation time (23 h, IQR: 16-53 h vs. 16 h, IQR: 11-23 h, p < 0.001). Other postoperative outcomes have not shown significant differences between two groups. After matching, no significant difference was found between both groups for all postoperative outcomes. The Kaplan-Meier survivul estimate and log-rank test showed that the 90-day survival had no significant differences between two groups before and after matching. Conclusion Our study found that a low-dose infusion of levosimendan in AMI-VSR patients underwent surgical repair did not associated with positively affect to postoperative outcomes.