a statistical trendp = 0.07
Analysis Stratified by LV Unloading Technique As secondary analysis, we assessed the impact of the different unloading techniques on mortality and weaning: 5 studies (382 patients) reported on LV unloading by direct LV venting catheters: a statistical trend of 32% reduced mortality risk was demonstrated for ECMO + LV venting as compared to ECMO alone: RR (95%CIs): 0.68 (0.45–1.03); p = 0.07; I 2 = 28%; Figure A12 and Table A5 .