[Outcome determinants in cardiac arrest patients secondary to acute myocardial infarction receiving extra-corporeal membrane oxygenation combined with percutaneous coronary intervention therapy].

Objective: To investigate the clinical efficacy and outcome determinants in cardiac arrest patients secondary to acute myocardial infarction treated with extracorporeal membrane oxygenation (ECMO) and percutaneous coronary intervention (PCI). Methods: The clinical data of 27 patients hospitalized from January 2014 to March 2017 in 3 hospitals were retrospectively analyzed. The clinical data of the surviving group (12 cases) and the death group (15 cases) were compared and the outcome determinants were explored. Results: Twenty seven patients were successfully treated with coronary angiography and emergency PCI under ECMO assistance, and the successful procedure rate was 100%. The survival rate was 44.4% (12/27). There was no significant difference in gender, age, body weight, myocardial infarct location, past disease history and smoking status between the two groups (all P >0.05). Traditional cardiopulmonary resuscitation time was significantly longer, the CCU hospitalization time was significantly shorter, the number of diseased vessels was significantly higher, and the prevalence of distribution of blood vessels in left main stem was significantly higher and mean artery pressure at 24 and 48 hours post ECMO was significantly lower in the death group than in survival group (all P <0.05). Multiple logistic regression analysis showed that left anterior descending artery lesion, higher number of lesion vessels, longer traditional cardiopulmonary resuscitation time, longer time interval between cardiac arrest and ECMO placement were related increased risk of death post ECMO and emergency PCI in this patient cohort( OR =1.316, 95% CI 1.217-5.792, P =0.002; OR =1.238, 95% CI 1.107-4.961, P =0.000; OR =1.712, 95% CI 1.136-3.973, P =0.001; OR =1.629, 95% CI 1.132-4.521, P =0.000, respectively), while higher mean artery pressure at 48 hours post ECMO was related with reduced risk of death post ECMO and emergency PCI in this patient cohort( OR =0.672, 95% CI 0.326-0.693, P =0.001). Conclusions: ECMO combined with emergency PCI can improve the success rate of traditional cardiopulmonary resuscitation in patients with cardiac arrest secondary to acute myocardial infarction. Left anterior descending artery lesion, number of lesion vessels, traditional cardiopulmonary resuscitation time, time interval between cardiac arrest and ECMO placement and mean artery pressure at 48 hours post ECMO are outcome determinants post ECMO and emergency PCI in this patient cohort.