Effect of Ischemic Postconditioning During Primary Percutaneous Coronary Intervention for Patients With ST-Segment Elevation Myocardial Infarction: A Randomized Clinical Trial

Thomas Engstrøm, Henning Kelbæk, Steffen Helqvist, Dan Eik Høfsten, Lene Kløvgaard, Peter Clemmensen, Lene Holmvang, Erik Jørgensen, Frants Pedersen, Kari Saunamaki, Jan Ravkilde, Hans-Henrik Tilsted, Anton Villadsen, Jens Aarøe, Svend Eggert Jensen, Bent Raungaard, Hans E Bøtker, Christian Juhl Terkelsen, Michael Maeng, Anne KaltoftLars Romer Krusell, Lisette O Jensen, Karsten Tange Veien, Klaus Fuglsang Kofoed, Christian Torp-Pedersen, Kasper Kyhl, Lars Nepper-Christensen, Marek Treiman, Niels Vejlstrup, Kiril A Ahtarovski, Jacob Lønborg, Lars Køber, Third Danish Study of Optimal Acute Treatment of Patients With ST Elevation Myocardial Infarction–Ischemic Postconditioning (DANAMI-3–iPOST) Investigators

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109 Citationer (Scopus)

Abstract

Importance: Ischemic postconditioning of the heart during primary percutaneous coronary intervention (PCI) induced by repetitive interruptions of blood flow to the ischemic myocardial region immediately after reopening of the infarct-related artery may limit myocardial damage.

Objective: To determine whether ischemic postconditioning can improve the clinical outcomes in patients with ST-segment elevation myocardial infarction (STEMI).

Design, Setting, And Participants: In this multicenter, randomized clinical trial, patients with onset of symptoms within 12 hours, STEMI, and thrombolysis in myocardial infarction (TIMI) grade 0-1 flow in the infarct-related artery at arrival were randomized to conventional PCI or postconditioning. Inclusion began on March 21, 2011, through February 2, 2014, and follow-up was completed on February 2, 2016. Analysis was based on intention to treat.

Interventions: Patients were randomly allocated 1:1 to conventional primary PCI, including stent implantation, or postconditioning performed as 4 repeated 30-second balloon occlusions followed by 30 seconds of reperfusion immediately after opening of the infarct-related artery and before stent implantation.

Main Outcome and Measures: A combination of all-cause death and hospitalization for heart failure.

Results: During the inclusion period, 1234 patients (975 men [79.0%] and 259 women [21.0%]; mean [SD] age, 62 [11] years) underwent randomization in the trial. Median follow-up was 38 months (interquartile range, 24-58 months). The primary outcome occurred in 69 patients (11.2%) who underwent conventional primary PCI and in 65 (10.5%) who underwent postconditioning (hazard ratio, 0.93; 95% CI, 0.66-1.30; P = .66). The hazard ratios were 0.75 (95% CI, 0.49-1.14; P = .18) for all-cause death and 0.99 (95% CI, 0.60-1.64; P = .96) for heart failure.

Conclusions and Relevance: Routine ischemic postconditioning during primary PCI failed to reduce the composite outcome of death from any cause and hospitalization for heart failure in patients with STEMI and TIMI grade 0-1 flow at arrival.

Trial Registration: clinicaltrials.gov Identifier: NCT01435408.

OriginalsprogEngelsk
TidsskriftJAMA Cardiology
Vol/bind2
Udgave nummer5
Sider (fra-til)490-497
Antal sider8
ISSN2380-6583
DOI
StatusUdgivet - 2017

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