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Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
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Microaxial Flow Pump or Standard Care in Infarct-Related Cardiogenic Shock.

Jacob E Møller1, Thomas Engstrøm1, Lisette O Jensen1

  • 1From the Department of Cardiology, Copenhagen University Hospital-Rigshospitalet (J.E.M., T.E., M.F., L.H., J.K., R.S., J.L., S.B., C.H.), and the Department of Clinical Medicine, University of Copenhagen (T.E., L.H., C.H.), Copenhagen, the Departments of Cardiology (J.E.M., L.O.J., N.L.J.U., A.J., J.F.L.), Anesthesiology and Intensive Care (H.S., H.B.R.), and Nuclear Medicine (O.G.), Odense University Hospital, and the Department of Clinical Research, University of Southern Denmark (J.E.M., L.O.J., H.B.R., J.F.L.), Odense, the Departments of Cardiology (H.E., C.J.T., E.H.C.) and Anesthesiology and Intensive Care Medicine (S.C.), Aarhus University Hospital, Aarhus, and the Department of Cardiology, Zealand University Hospital, Roskilde (P.C., M.G.L.) - all in Denmark; the Department of Internal Medicine and Cardiology, Heart Center Dresden, University Hospital, Technische Universität Dresden, Dresden (N.M., A.L., F.J.W.), the Department of Cardiology, Pulmonology, and Vascular Medicine, University Hospital Düsseldorf, Medical Faculty of the Heinrich Heine University Düsseldorf, and the Cardiovascular Research Institute Düsseldorf, Düsseldorf (A.P., R.W.), the Department of Internal Medicine I, Cardiology, Angiology, and Intensive Medical Care, University Hospital Jena, Jena (P.C.S., S.M.-W.), the Department of Cardiology, Angiology, and Intensive Care Medicine, Deutsches Herzzentrum der Charité, Campus Benjamin Franklin, and Deutsches Zentrum für Herz Kreislauf Forschung, Berlin (C.S.), the Department of Internal Medicine I, University Hospital Würzburg, Würzburg (P.N.), the Department of Cardiology, University Heart and Vascular Center, University Clinic Hamburg-Eppendorf, Hamburg (P.C.), the Department of Cardiology, University Hospital Bonn, Bonn (S.Z.), the Department of Cardiology and Angiology, Hannover Medical School, Hannover (A.S.), and the Department of Internal Medicine III, Heart Center Trier, Krankenhaus der Barmherzigen Brüder, Trier (N.W.) - all in Germany; the Department of Cardiology, Royal Brompton and Harefield Hospitals, Guy's and St. Thomas' NHS Foundation Trust, Harefield Hospital, Harefield, United Kingdom (V.P.); and the Greenberg Division of Cardiology, Department of Medicine, Weill Cornell Medicine, New York (K.W.).

The New England Journal of Medicine
|April 8, 2024
PubMed
Summary
This summary is machine-generated.

Temporary mechanical circulatory support using a microaxial flow pump reduced mortality in ST-segment elevation myocardial infarction patients with cardiogenic shock. However, this approach increased the risk of adverse events compared to standard care alone.

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Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Critical Care Medicine

Background:

  • The efficacy of microaxial flow pumps for ST-segment elevation myocardial infarction (STEMI) with cardiogenic shock is not well-established.
  • Temporary mechanical circulatory support aims to improve outcomes in high-risk cardiac patients.

Purpose of the Study:

  • To evaluate the impact of a microaxial flow pump (Impella CP) plus standard care versus standard care alone on 180-day mortality in STEMI patients with cardiogenic shock.
  • To assess the safety profile, including a composite of adverse events, associated with microaxial flow pump use.

Main Methods:

  • An international, multicenter, randomized trial involving 355 patients with STEMI and cardiogenic shock.
  • Patients were assigned to receive either a microaxial flow pump (Impella CP) with standard care or standard care alone.
  • The primary endpoint was all-cause death at 180 days; a composite safety endpoint included severe bleeding, limb ischemia, hemolysis, device failure, or worsening aortic regurgitation.

Main Results:

  • All-cause mortality at 180 days was lower in the microaxial-flow-pump group (45.8%) compared to the standard-care group (58.5%), with a hazard ratio of 0.74 (95% CI, 0.55 to 0.99; P=0.04).
  • A composite safety endpoint event occurred in 24.0% of patients in the microaxial-flow-pump group versus 6.2% in the standard-care group (relative risk, 4.74).
  • The incidence of renal-replacement therapy was higher in the microaxial-flow-pump group (41.9%) compared to the standard-care group (26.7%).

Conclusions:

  • Routine use of a microaxial flow pump with standard care for STEMI-related cardiogenic shock significantly reduced 180-day mortality compared to standard care alone.
  • The use of the microaxial flow pump was associated with a higher incidence of a composite of adverse events.
  • Further research may be needed to optimize the use of mechanical circulatory support in this patient population.