Magnetic resonance imaging characterization of circumferential and longitudinal strain under various coronary interventions in swine
Magnetic resonance imaging characterization of circumferential and longitudinal strain under various coronary interventions in swine作者机构：Department of Radiology and Biomedical Imaging School of Medicine University of California San Francisco School of Medicine University of California San Diego
出 版 物：《World Journal of Radiology》 (世界放射学杂志（英文版）（电子版）)
年 卷 期：2013年第5卷第12期
页 面：472-483页
学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 1009[医学-特种医学] 10[医学]
主 题：Magnetic resonance imaging Percutaneous coronary interventions Acute myocardial infarct Microembolization Myocardial strain
摘 要：AIM:To compare the acute changes in circumferential and longitudinal strain after exposing a coronary artery to various interventions in ***:Percutaneous balloon angioplasty catheter was guided to location aid device(LAD)under X-ray fluoroscopy to create different patterns of ischemic ***(n=32)were equally divided into 4 groups:controls,90 min LAD occlusion/reperfusion,LAD microembolization,and combined LAD occlusion/microembolization/*** days after interventions,cine,tagged and viability magnetic resonance imaging(MRI)were acquired to measure and compare left and right circumferential strain,longitudinal strain and myocardial viability,*** were obtained using HARP and semi-automated threshold method and statistically analyzed using unpaired *** and vascular damage was characterized ***:Coronary microemboli caused greater impairment in l left ventricular(LV)circumferential strain and dyssynchrony than LAD occlusion/reperfusion despite the significant difference in the extent of myocardial *** also caused significant decrease in peak systolic strain rate of remote myocardium and LV *** MRI demonstrated the interaction between LV and right ventricular(RV)at 3 d after *** increase in RV free wall longitudinal strain was seen in response to all *** MRI,histochemical staining and microscopy revealed different patterns of myocardial damage and microvascular ***:Cine MRI revealed subtle changes in LV strain caused by various ischemic *** also demonstrated the interaction between the right and left ventricles after coronary *** microemboli with and without acute myocardial infarction(AMI)cause complex myocardial injury and ventricular dysfunction that is not replicated in solely AMI.
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