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Quantitative T2 mapping after reperfusion therapy in patients with acute myocardial infarction: A comparison with late gadolinium enhancement and cine MR imaging

 Chul Hwan Park  ;  Eui-Young Choi  ;  Young Won Yoon  ;  Hyuck Moon Kwon  ;  Bum Kee Hong  ;  Byoung Kwon Lee  ;  Pil-Ki Min  ;  Andreas Greiser  ;  Mun Young Paek  ;  Sung Ho Hwang  ;  Tae Hoon Kim 
 MAGNETIC RESONANCE IMAGING, Vol.33(10) : 1246-1252, 2015 
Journal Title
Issue Date
Acute Disease ; Contrast Media* ; Female ; Gadolinium* ; Humans ; Magnetic Resonance Imaging, Cine* ; Male ; Middle Aged ; Myocardial Infarction/physiopathology* ; Myocardial Infarction/therapy* ; Reperfusion* ; Retrospective Studies
Cine MRI ; Delayed enhancement ; Myocardial edema ; Myocardial infarction ; T2 map
PURPOSE: This study evaluates myocardial edema by quantitative T2 mapping in patients with acute myocardial infarction (AMI) and compares the lateral extent of myocardial edema with those of infarcted and dysfunctional myocardium. MATERIALS AND METHODS: Cardiac magnetic resonance images (MRIs) of 31 patients (M:F=29:2, mean age: 52.5±10.8years) with AMI were reviewed. On cine-MRI, all short axis images of the left ventricle (LV) were divided into 60 sectors. The regional wall motion of each sector was calculated as follows: systolic wall thickening (SWT, %)=[(LV wall thicknessES-LV wall thicknessED)/LV wall thicknessED]*100. Dysfunctional myocardium was defined as sectors with decreased SWT lower than 40%. On LGE-images, myocardial infarction was defined as an area of hyper-enhancement more than 5 SDs from the remote myocardium. On T2 map, myocardial edema was defined as an area in which T2 values were at least 2 SDs higher than those from remote myocardium. The lateral extents of infarcted myocardium, myocardial edema, and dysfunctional myocardium were calculated as the percentage of central angles ((central angle of the involved myocardium/360)*100 (%)) and then compared. RESULTS: The lateral extent of myocardial edema was slightly larger than that of infarcted myocardium (37.4±13.3% vs. 35±12.9%, p<0.01). The lateral extent of dysfunctional myocardium (50.6±15.3%) was significantly larger than that of infarcted myocardium or myocardial edema (p<0.001). CONCLUSIONS: The lateral extent of myocardial edema beyond the infarcted myocardium might be narrow, but the dysfunctional myocardium could be significantly larger than myocardial edema, suggesting stunned myocardium without edema.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kwon, Hyuck Moon(권혁문) ORCID logo https://orcid.org/0000-0001-9901-5015
Kim, Tae Hoon(김태훈) ORCID logo https://orcid.org/0000-0003-3598-2529
Min, Pil Ki(민필기) ORCID logo https://orcid.org/0000-0001-7033-7651
Park, Chul Hwan(박철환) ORCID logo https://orcid.org/0000-0002-0004-9475
Yoon, Young Won(윤영원) ORCID logo https://orcid.org/0000-0002-0907-0350
Lee, Byoung Kwon(이병권) ORCID logo https://orcid.org/0000-0001-9259-2776
Choi, Eui Young(최의영) ORCID logo https://orcid.org/0000-0003-3732-0190
Hong, Bum Kee(홍범기) ORCID logo https://orcid.org/0000-0002-6456-0184
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