Identifying the Infarct-Related Artery in Patients With Non-ST-Segment-Elevation Myocardial Infarction.

Published

Journal Article

BACKGROUND: Determining the infarct-related artery (IRA) in non-ST-segment-elevation myocardial infarction (MI) can be challenging. Delayed-enhancement cardiac magnetic resonance (DE-CMR) can accurately identify small MIs. The purpose of this study was to determine whether DE-CMR improves the ability to identify the IRA in patients with non-ST-segment-elevation MI. METHODS AND RESULTS: In this 3-center, prospective study, we enrolled 114 patients presenting with their first MI. Patients underwent DE-CMR followed by coronary angiography. The interventional cardiologist was blinded to the DE-CMR results. Later, coronary angiography and DE-CMR images were reviewed independently and blindly for identification of the IRA. The pattern of DE-CMR hyperenhancement was also used to determine whether there was a nonischemic pathogenesis for myocardial necrosis. The IRA was not identifiable by coronary angiography in 37% of patients (n=42). In these, the IRA or a new noncoronary artery disease diagnosis was identified by DE-CMR in 60% and 19% of patients, respectively. Even in patients with an IRA determined by coronary angiography, a different IRA or a noncoronary artery disease diagnosis was identified by DE-CMR in 14% and 13%, respectively. Overall, DE-CMR led to a new IRA diagnosis in 31%, a diagnosis of nonischemic pathogenesis in 15%, or either in 46% (95% CI, 37%-55%) of patients. Of 55 patients undergoing revascularization, 27% had revascularization solely to nonculprit coronary artery territories as determined by DE-CMR. CONCLUSIONS: Identification of the IRA by coronary angiography can be challenging in patients with non-ST-segment-elevation MI. In nearly half, DE-CMR may lead to a new IRA diagnosis or elucidate a nonischemic pathogenesis. Revascularization solely of coronary arteries that are believed to be nonculprit arteries by DE-CMR is not uncommon.

Full Text

Duke Authors

Cited Authors

  • Heitner, JF; Senthilkumar, A; Harrison, JK; Klem, I; Sketch, MH; Ivanov, A; Hamo, C; Van Assche, L; White, J; Washam, J; Patel, MR; Bekkers, SCAM; Smulders, MW; Sacchi, TJ; Kim, RJ

Published Date

  • May 2019

Published In

Volume / Issue

  • 12 / 5

Start / End Page

  • e007305 -

PubMed ID

  • 31035776

Pubmed Central ID

  • 31035776

Electronic International Standard Serial Number (EISSN)

  • 1941-7632

Digital Object Identifier (DOI)

  • 10.1161/CIRCINTERVENTIONS.118.007305

Language

  • eng

Conference Location

  • United States