Abstract | BACKGROUND: Prognosis in acute myocardial infarction (AMI) depends on the amount of infarct-related artery (IRA)-subtended myocardium and associated damage but has not been described in great detail. Consequently, we sought to describe IRA-associated pathophysiological consequences using cardiac magnetic resonance (CMR). METHODS: 1235 AMI patients (n = 795 ST-elevation ( STEMI) and 440 non- STEMI) underwent CMR following percutaneous coronary intervention. Blinded core-laboratory data were compared according to left anterior descending (LAD), left circumflex (LCx) and right coronary artery (RCA) regarding major adverse clinical events ( MACE) within 12 months. Left ventricular (LV) global longitudinal/circumferential/radial (GLS/GCS/GRS) as well as left atrial (LA) total (εs), passive (εe) and active (εa) strains were determined using CMR-feature tracking. Tissue characterisation included infarct size (IS) and microvascular obstruction. RESULTS: LAD and LCx were associated with higher mortality compared to RCA lesions (4.6% and 4.4% vs 1.6%). LAD lesions showed largest IS (16.8%), largest ventricular [LV ejection fraction (EF) 47.4%, GLS - 13.2%, GCS - 20.8%] and atrial (εs 20.2%) impairment. There was less impairment in LCx (IS 11.8%, LVEF 50.8%, GLS - 17.4%, GCS - 25.0%, εs 20.7%) followed by RCA lesions (IS 11.3%, LVEF 50.8%, GLS - 19.1%, GCS - 26.6%, εs 21.7%). In AUC analyses, εs (LAD, RCA) and GLS (LCx) best predicted MACE (AUC > 0.69). Multivariate analyses identified εs (p = 0.017) in LAD and GLS (p = 0.034) in LCx infarcts as independent predictors of MACE. CONCLUSIONS: CMR allows IRA-specific phenotyping and characterisation of morphologic and functional changes. These alterations carry infarct-specific prognostic implications, and may represent novel diagnostic and therapeutic targets following AMI. TRIAL REGISTRATION: ClinicalTrials.gov: NCT00712101 and NCT01612312.
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Authors | Sören J Backhaus, Johannes T Kowallick, Thomas Stiermaier, Torben Lange, Alexander Koschalka, Jenny-Lou Navarra, Joachim Lotz, Shelby Kutty, Boris Bigalke, Matthias Gutberlet, Hans-Josef Feistritzer, Gerd Hasenfuß, Holger Thiele, Andreas Schuster, Ingo Eitel |
Journal | Clinical research in cardiology : official journal of the German Cardiac Society
(Clin Res Cardiol)
Vol. 109
Issue 3
Pg. 339-349
(Mar 2020)
ISSN: 1861-0692 [Electronic] Germany |
PMID | 31278521
(Publication Type: Journal Article, Randomized Controlled Trial)
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Topics |
- Aged
- Atrial Function, Left
(physiology)
- Female
- Humans
- Magnetic Resonance Imaging
- Male
- Middle Aged
- Non-ST Elevated Myocardial Infarction
(diagnostic imaging, physiopathology, therapy)
- Percutaneous Coronary Intervention
- Prognosis
- ST Elevation Myocardial Infarction
(diagnostic imaging, physiopathology, therapy)
- Ventricular Function, Left
(physiology)
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