The influence of microvascular injury on native T1 and T2*relaxation values after acute myocardial infarction: implications for non-contrast-enhanced infarct assessment

被引:23
作者
Robbers, Lourens F. H. J. [1 ]
Nijveldt, Robin [1 ]
Beek, Aernout M. [1 ]
Teunissen, Paul F. A. [1 ]
Hollander, Maurits R. [1 ]
Biesbroek, P. Stefan [1 ]
Everaars, Henk [1 ]
van de Ven, Peter M. [2 ]
Hofman, Mark B. M. [3 ]
van Royen, Niels [1 ]
van Rossum, Albert C. [1 ]
机构
[1] Vrije Univ Amsterdam Med Ctr, Dept Cardiol, ZH 5F012,De Boelelaan 1117, NL-1081 HV Amsterdam, Netherlands
[2] Vrije Univ Amsterdam Med Ctr, Dept Clin Epidemiol & Biostat, Amsterdam, Netherlands
[3] Vrije Univ Amsterdam Med Ctr, Dept Phys & Med Technol, Amsterdam, Netherlands
关键词
Cardiovascular Magnetic Resonance imaging; Acute myocardial infarction; T1; mapping; T2*mapping; Microvascular injury; CARDIAC MAGNETIC-RESONANCE; INVERSION-RECOVERY MOLLI; INTRAMYOCARDIAL HEMORRHAGE; CORONARY INTERVENTION; FUNCTIONAL RECOVERY; REFLOW PHENOMENON; MR APPEARANCE; OBSTRUCTION; ISCHEMIA; EDEMA;
D O I
10.1007/s00330-017-5010-x
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Native T1 mapping and late gadolinium enhancement (LGE) imaging offer detailed characterisation of the myocardium after acute myocardial infarction (AMI). We evaluated the effects of microvascular injury (MVI) and intramyocardial haemorrhage on local T1 and T2* values in patients with a reperfused AMI. Forty-three patients after reperfused AMI underwent cardiovascular magnetic resonance imaging (CMR) at 4 [3-5] days, including native MOLLI T1 and T2* mapping, STIR, cine imaging and LGE. T1 and T2* values were determined in LGE-defined regions of interest: the MI core incorporating MVI when present, the core-adjacent MI border zone (without any areas of MVI), and remote myocardium. Average T1 in the MI core was higher than in the MI border zone and remote myocardium. However, in the 20 (47%) patients with MVI, MI core T1 was lower than in patients without MVI (MVI 1048 +/- 78ms, no MVI 1111 +/- 89ms, p=0.02). MI core T2* was significantly lower in patients with MVI than in those without (MVI 20 [18-23]ms, no MVI 31 [26-39]ms, p < 0.001). The presence of MVI profoundly affects MOLLI-measured native T1 values. T2* mapping suggested that this may be the result of intramyocardial haemorrhage. These findings have important implications for the interpretation of native T1 values shortly after AMI.
引用
收藏
页码:824 / 832
页数:9
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