Abstract
Background: Intramyocardial haemorrhage (IMH) and microvascular obstruction (MVO) represent reperfusion injury after reperfused ST-elevation myocardial infarction (STEMI) with prognostic impact and “hypointense core” (HIC) appearance in T2-weighted images. We aimed to distinguish between IMH and MVO by using T2*-weighted cardiovascular magnetic resonance imaging (CMR) and analysed influencing factors for IMH development.
Methods and results: A total of 151 patients with acute STEMI underwent CMR after primary angioplasty. T2-STIR sequences were used to identify HIC, late gadolinium enhancement to visualise MVO and T2*-weighted sequences to detect IMH. IMH+/IMH− patients were compared considering infarct size, myocardial salvage, thrombolysis in myocardial infarction (TIMI) flow, reperfusion time, ventricular volumes, function and pre-interventional medication. Seventy-six patients (50 %) were IMH+, 82 (54 %) demonstrated HIC and 100 (66 %) MVO. IMH was detectable without HIC in 16 %, without MVO in 5 % and HIC without MVO in 6 %. Multivariable analyses revealed that IMH was associated with significant lower left ventricular ejection fraction and myocardial salvage index, larger left ventricular volume and infarct size. Patients with TIMI flow grade ≤1 before angioplasty demonstrated IMH significantly more often.
Conclusions: IMH is associated with impaired left ventricular function and higher infarct size. T2 and HIC imaging showed moderate agreement for IMH detection. T2* imaging might be the preferred CMR imaging method for comprehensive IMH assessment.
Key Points: • Intramyocardial haemorrhage is a common finding in patients with acute reperfused myocardial-infarction.
• T2*imaging should be the preferred CMR method for assessment of intramyocardial haemorrhage.
• Intramyocardial haemorrhage can be considered as an important influencing factor on patient’s outcome.
Original language | English |
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Journal | European Radiology |
Volume | 24 |
Issue number | 12 |
Pages (from-to) | 3277-3288 |
Number of pages | 12 |
ISSN | 0938-7994 |
DOIs | |
Publication status | Published - 14.11.2014 |
Research Areas and Centers
- Centers: Cardiological Center Luebeck (UHZL)
DFG Research Classification Scheme
- 205-12 Cardiology, Angiology