scholarly journals MRI evaluation of microvascular obstruction in experimental reperfused acute myocardial infarction using a T1 and T2 preparation pulse sequence

2007 ◽  
Vol 26 (6) ◽  
pp. 1486-1492 ◽  
Author(s):  
Yuesong Yang ◽  
Warren D. Foltz ◽  
John J. Graham ◽  
Jay S. Detsky ◽  
Alexander J. Dick ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Microvascular Obstruction ◽  
Pulse Sequence ◽  
Reperfused Acute Myocardial Infarction ◽  
Preparation Pulse ◽  
T1 And T2 ◽  
Mri Evaluation

scholarly journals Serial transthoracic coronary Doppler shows complete reversibility of microvascular obstruction pattern at one month after reperfused acute myocardial infarction.

2017 ◽  
Vol 19 (1) ◽  
pp. 45 ◽  
Author(s):  
Camelia Diana Ober ◽  
Mihai Claudiu Ober ◽  
Adrian Corneliu Iancu
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Time Course ◽  
Microvascular Obstruction ◽  
Prognostic Significance ◽  
Coronary Microcirculation ◽  
Anterior Myocardial Infarction ◽  
No Reflow ◽  
Reperfused Acute Myocardial Infarction ◽  
Deceleration Time

“No reflow” phenomenon is a common complication with significant prognostic repercussions after reperfused acute myocardial infarction. Previous studies have shown the feasibility and prognostic significance of coronary microcirculation assessment by transthoracic Doppler of left anterior descending artery (LAD). The aim of the study was to evaluate the time course of the coronary microcirculation status after acute anterior myocardial infarction reperfused by primary angioplasty with stent on LAD. Material and methods: Twenty-three patients underwent transthoracic echocardiography at 3 days (M0) and one month (M1) after reperfusion, with LAD flow analysis (peak systolic and diastolic velocities, diastolic deceleration time and systolic flow reversal). The patients were divided into two groups, of good reperfusion and “no reflow”, by a 600 ms cut-off of the M0 diastolic deceleration time, previously shown to best discriminate between the two microvascular reperfusion states. Results: Of all patients, 21 survived to M1 and were included in analysis. Microvascular obstruction, as defined, was present in 50% of patients at M0 and it was associated with significantly worse ejection fraction both at M0 and M1 (p=0.01 and 0.04, respectively). Killip class at admission was the only independent predictor of “no reflow”. DDT increased from 661.9±339.3 at M0 to 948.2±201.8 at M1 (p=0.0003). In patients with initial “no reflow”, DDT increased to normal values at M1 (876.2±167.7 vs. 346.3±133.9 at M0, p<0.0001). In these patients, the PDV/PSV ratio decreased at one month (1.91±0.37 vs. 2.70±1.22, p=0.06), by decrease of PDV (0.29±0.06 vs. 0.40±0.19, p=0.03). Conclusions: The parameters of coronary microcirculatory impedance improve significantly at one month after infarction, suggesting delayed full reversibility of the microvascular obstruction.

scholarly journals Clinical Importance of Microvascular Obstruction on Contrast-Enhanced MRI in Reperfused Acute Myocardial Infarction

2008 ◽  
Vol 72 (2) ◽  
pp. 200-204 ◽  
Author(s):  
Michinobu Nagao ◽  
Hiroshi Higashino ◽  
Hiroshi Matsuoka ◽  
Hideo Kawakami ◽  
Teruhito Mochizuki ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Microvascular Obstruction ◽  
Clinical Importance ◽  
Enhanced Mri ◽  
Reperfused Acute Myocardial Infarction ◽  
Contrast Enhanced ◽  
Contrast Enhanced Mri

scholarly journals MRI of Reperfused Acute Myocardial Infarction Edema: ADC Quantification versus T1 and T2 Mapping

Radiology ◽  
2020 ◽  
Vol 295 (3) ◽  
pp. 542-549
Author(s):  
Kevin Moulin ◽  
Magalie Viallon ◽  
William Romero ◽  
Alban Chazot ◽  
Nathan Mewton ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
T2 Mapping ◽  
Reperfused Acute Myocardial Infarction ◽  
T1 And T2
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