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Eur Heart J Cardiovasc Imaging. 2016 Jul;17(7):744-53. doi: 10.1093/ehjci/jew027. Epub 2016 Mar 21.

Multi-vendor, multicentre comparison of contrast-enhanced SSFP and T2-STIR CMR for determining myocardium at risk in ST-elevation myocardial infarction.

Author information

1
Department of Clinical Physiology, Clinical Sciences, Lund University, Lund, Sweden.
2
University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
3
Department of Clinical Physiology, Clinical Sciences, Lund University, Lund, Sweden Department of Biomedical Engineering, Faculty of Engineering, Lund University, Sweden.
4
Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden.
5
Department of Heart Disease, Haukeland University Hospital, Bergen Department of Biomedicine, University of Bergen, Bergen, Norway.
6
Section for Interventional Cardiology, Department of Cardiology, Oslo University Hospital, Ullevål, Oslo, Norway.
7
Department of Cardiology B, Oslo University Hospital Ullevål, University of Oslo, Oslo, Norway.
8
Department of Clinical Physiology, Clinical Sciences, Lund University, Lund, Sweden Laboratory of Medical Informatics, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
9
Department of Clinical Physiology, Clinical Sciences, Lund University, Lund, Sweden hakan.arheden@med.lu.se.

Abstract

AIMS:

Myocardial salvage, determined by cardiac magnetic resonance imaging (CMR), is used as end point in cardioprotection trials. To calculate myocardial salvage, infarct size is related to myocardium at risk (MaR), which can be assessed by T2-short tau inversion recovery (T2-STIR) and contrast-enhanced steady-state free precession magnetic resonance imaging (CE-SSFP). We aimed to determine how T2-STIR and CE-SSFP perform in determining MaR when applied in multicentre, multi-vendor settings.

METHODS AND RESULTS:

A total of 215 patients from 17 centres were included after percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction. CMR was performed within 1-8 days. These patients participated in the MITOCARE or CHILL-MI cardioprotection trials. Additionally, 8 patients from a previous study, imaged 1 day post-CMR, were included. Late gadolinium enhancement, T2-STIR, and CE-SSFP images were acquired on 1.5T MR scanners (Philips, Siemens, or GE). In 65% of the patients, T2-STIR was of diagnostic quality compared with 97% for CE-SSFP. In diagnostic quality images, there was no difference in MaR by T2-STIR and CE-SSFP (bias: 0.02 ± 6%, P = 0.96, r(2) = 0.71, P < 0.001), or between treatment and control arms. No change in size or quality of MaR nor ability to identify culprit artery was seen over the first week after the acute event (P = 0.44).

CONCLUSION:

In diagnostic quality images, T2-STIR and CE-SSFP provide similar estimates of MaR, were constant over the first week, and were not affected by treatment. CE-SSFP had a higher degree of diagnostic quality images compared with T2 imaging for sequences from two out of three vendors. Therefore, CE-SSFP is currently more suitable for implementation in multicentre, multi-vendor clinical trials.

KEYWORDS:

AAR; area at risk; ischaemia; magnetic resonance imaging; myocardium at risk

PMID:
27002140
PMCID:
PMC4907382
DOI:
10.1093/ehjci/jew027
[Indexed for MEDLINE]
Free PMC Article

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