Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 8 2 2022 04 02 118 122 Alireza jahangirifard Chronic Respiratory Disease Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran. Mandana Hosseinzadeh Masih Deveshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Sepideh Nazari Masih Deveshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Amir Bahrami Ahmadi Occupational Medicine Research Center Iran University of Medical Sciences, Tehran, Iran. Farhad Gorjipour Iranian Scientific Society of Extracorporeal Technology, Shahid Rajaie Cardiovascular, Medical and Research Center, Iran university of Medical sciences, Tehran, Iran. Seyed Bashir Mirtajani Lung transplant Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran. Zargham Hossein Ahmadi Department of Surgery, Masih Daneshvari Hospital, Shaheed Beheshti University of Medical Sciences, Tehran, Iran. 2021 11 04 2021 11 27 Background: There are inconclusive data of Ven venous extracorporeal membrane oxygenation (VV‐ECMO) VV‐ECMO for a therapeutic strategy for acute respiratory distress syndrome (ARDS). Methods: Totally 28 critically ill patients were included into the study between 23 September 2013 and 20 january 2020. Critically ill adult patients who were refractory to conventional therapeutic modalities were eligible for veno-venous ECMO and study inclusion. Results: Of a total of 28 patients, 15 patients (53.6%) survived and 13 (46.42%) died. Gender frequency had no significant difference between survivors and non-survivors (P=0.07). Mean of age and BMI had no significant differences between the mentioned groups also (P>0.05). It was the same for BSA and the two groups were in the same situation (1.82±0.37 vs. 1.79±0.29; P=0.81). There were no significant differences between survivors and non-survivors regarding ECMO time (114.49±91.05 vs. 162.62±100.17 minutes; P=0.20) and ICU stays (9.65±5.11 vs. 8.93±4.96; P=0.10). The average time of ICU stay was 9.29±5.16 days. The ejection fraction in survives was significantly higher than non-survivors (52.14±6.42 vs. 57.31±4.39; P=0.02). Those patients who were in the non-survivors group had lower blood pressure (MAP<65mmHg) during the study (P=0.049), however, did not find any significant differences between the groups regarding inotropes or vasoconstrictors. Conclusion: In this study, the mortality rate was 46.42%. Bleeding, hypotension and dialysis were the risk factors for mortality among study participants. https://aacc.tums.ac.ir/index.php/aacc/article/view/425