1-Year Outcomes of Delayed Versus Immediate Intervention in Patients With Transient ST-Segment Elevation Myocardial Infarction

GN Janssens, NW van der Hoeven, JS Lemkes, H Everaars, PM van de Ven, KMJ Marques, A Nap, M.A.H. van Leeuwen, JEA Appelman, P Knaapen, CJW Verouden, CP Allaart, S. Brinckman, CE Saraber, K. Plomp, Jorik R Timmer, Elvin Kedhi, Renicus S Hermanides, Martijn Meuwissen, Jeroen SchaapArno P. Van Der Weerdt, AC van Rossum, R Nijveldt, N van Royen

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Objectives The aim of the present study was to determine the effect of a delayed versus an immediate invasive approach on final infarct size and clinical outcome up to 1 year.

Background Up to 24% of patients with acute coronary syndromes present with ST-segment elevation myocardial infarction (STEMI) but show complete resolution of ST-segment elevation and symptoms before revascularization. Current guidelines do not clearly state whether these patients with transient STEMI should be treated with a STEMI-like or non–ST-segment elevation acute coronary syndrome–like intervention strategy.

Methods In this multicenter trial, 142 patients with transient STEMI were randomized 1:1 to either delayed or immediate coronary intervention. Cardiac magnetic resonance imaging was performed at 4 days and at 4-month follow-up to assess infarct size and myocardial function. Clinical follow-up was performed at 4 and 12 months.

Results In the delayed (22.7 h) and the immediate (0.4 h) invasive groups, final infarct size as a percentage of the left ventricle was very small (0.4% [interquartile range: 0.0% to 2.5%] vs. 0.4% [interquartile range: 0.0% to 3.5%]; p = 0.79), and left ventricular function was good (mean ejection fraction 59.3 ± 6.5% vs. 59.9 ± 5.4%; p = 0.63). In addition, the overall occurrence of major adverse cardiac events, consisting of death, recurrent infarction, and target lesion revascularization, up to 1 year was low and not different between both groups (5.7% vs. 4.4%, respectively; p = 1.00).

Conclusions At follow-up, patients with transient STEMI have limited infarction and well-preserved myocardial function in general, and delayed or immediate revascularization has no effect on functional outcome and clinical events up to 1 year.
Original languageEnglish
Pages (from-to)2272-2282
Number of pages11
JournalJACC Cardiovascular Interventions
Issue number22
Publication statusPublished - 25 Nov 2019


  • aborted STEMI
  • coronary angiography
  • invasive strategy
  • percutaneous coronary intervention
  • revascularization

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