• Saraschandra Vallabhajosyula, John C O'Horo, Phanindra Antharam, Sindhura Ananthaneni, Saarwaani Vallabhajosyula, John M Stulak, Mackram F Eleid, Shannon M Dunlay, Bernard J Gersh, Charanjit S Rihal, and Gregory W Barsness.
• Department of Cardiovascular Medicine (Saraschandra Vallabhajosyula, S.A., Saarwaani Vallabhajosyula, M.F.E., S.M.D., B.J.G., C.S.R., G.W.B.), Mayo Clinic, Rochester, MN.
• Circ Cardiovasc Interv. 2018 Sep 1; 11 (9): e006930.

BackgroundThere are contrasting reports on the effectiveness of a concomitant intra-aortic balloon pump (IABP) in cardiogenic shock patients treated with veno-arterial extracorporeal membrane oxygenation (VA-ECMO). This study sought to compare short-term mortality in patients with cardiogenic shock treated with VA-ECMO with and without IABP.Methods And ResultsWe reviewed the published literature from 2000 to 2018 for studies evaluating adult patients requiring VA-ECMO for cardiogenic shock with concomitant IABP. Studies reporting short-term mortality were included. Meta-analysis of the association of IABP with mortality was performed using Mantel-Haenszel models. Subgroup analyses were performed in patients with cardiogenic shock complicating acute myocardial infarction (AMI) and postcardiotomy cardiogenic shock. Twenty-two observational studies with 4653 patients were included. These studies showed high heterogeneity for the total and postcardiotomy cardiogenic shock cohorts and low heterogeneity for the AMI cohort. Short-term mortality was not significantly different in patients with and without IABP 42.1% versus 57.8%; risk ratio, 0.80; 95% CI, 0.52-1.22; P=0.30. However, concomitant IABP with VA-ECMO was associated with lower mortality in patients with AMI (50.8% versus 62.4%; risk ratio, 0.56; 95% CI, 0.46-0.67; P<0.001). There was no difference in mortality in postcardiotomy cardiogenic shock and mixed causes for cardiogenic shock.ConclusionsIn cardiogenic shock patients requiring VA-ECMO support, the use of IABP did not influence mortality in the total cohort. In patients with AMI, use of IABP with VA-ECMO was associated with 18.5% lower mortality in comparison to patients on VA-ECMO alone. Further randomized studies are warranted to corroborate these observational data.

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