题目 第一作者1,2，第二作者1,3， 及第三作者等 1,4* 1，大学，部门，城市 2国外单位举例：Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden 3国内单位举例：上海交通大学医学院瑞金医院放射科，上海 内容 你的海报应该涵盖你的工作的要点。 理想的海报旨在： 吸引眼球 简要概述您的工作 引发讨论和问题 格式 请不要更改此模板的页面大小。 请在文字和图表中使用大字体（中文宋体） 海报打印 请将您的海报电子版发送到littlewhite118@163.com(最终谁收集poster最后改为谁的邮箱）。 我们将彩色打印您的海报，并在研讨会之前为您粘贴。 展示于2017国际心血管磁共振协会中国区委员会第三界学术论坛，2017年8月4-7日 中国. 上海

Kaiyue Diao1, Zhigang Yang1*, and Min Ma2 , and Yingkun Guo 3 What clinical aspects could be associated with the imaging findings of acute myocardial infarction (AMI) patients Kaiyue Diao1, Zhigang Yang1*, and Min Ma2 , and Yingkun Guo 3 1Department of Radiology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China. 2Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China. 3 Department of Radiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China Purpose To recognize the predictors of “no-reflow” phenomenon or microvascular obstruction (MVO) for patients with first time ST- segment elevation acute myocardial infarction (STEMI) after primary percutaneous coronary intervention (PPCI) and analyze other cardiovascular magnetic resonance (CMR) signs for patients with MVO to reach a more comprehensive imaging evaluation. ＊ Materials and Methods Continuous patients with 1st-STEMI in our center were prospectively recruited and underwent PPCI within 12 hours from the September 2016 to January 2017. CMR was done within 4 days after PPCI for the patients in the supine position using a 3 T whole-body scanner (Skyra; Siemens Medical Solutions, Erlangen, Germany). 0.1 ml/kg body weight of Gadolinium was injected and late gadolinium enhanced (LGE) images were acquired in 10-15 mins following the published guidelines. Image analysis was performed on 4 areas, including the area with LGE, near the LGE, the normal area and the MVO area on a professional CMR analysis software (cvi.42). Wilcox test was performed for testing the difference between the groups. ROC analysis was performed to identify the best threshold for time-to-reperfusion to predict the presence of MVO. P<0.05 was considered significant. Results A total of 54 patients’ data was analyzed (age: 55.3 ± 9.03 y, male/female: 49/5). The average time-to-reperfusion and time between PPCI and CMR for patients were 5.20 ± 3.76 hours and 2.89 ± 0.37 days respectively. The signal intensity at the infarction area (LGE area), the proximal area near the LGE area, reference normal area and MVO area show significant difference with each other (Fig). Density plot showed a prominent trend that patients with a time-to-reperfusion of 4.5-6 hours can have smaller chance of having MVO after PPCI. The ROC analysis showed that a time-to-reperfusion at 4.5 hours had the best predictive value for the presence of MVO. Furthermore, a good correlation was found between the volume of LGE area and MVO area. (r=0.75, p<0.001). Conclusion Different time to reperfusion might have an effect on MVO’s presence, and the MVO’s degree is positively correlated with the severity of myocardial fibrosis. Presented at the 3rd SCMR China Symposium, in Shanghai, China, August 4-7, 2017