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对２０例冠心病患者（１９例心肌梗塞）行２０１Ｔ１再注射心肌ＳＰＥＣＴ显像，评价其检测缺血存活心肌的价值．方法：所有患者运动高峰时静脉注射２０１后分别行即刻、４小时＂再分布＂及再注射ＳＰＥＣＴ显像．结果：２０例患者运动后即刻显像显示心肌灌注异常，４小时“再分布”显像有可逆性灌注缺损１５例，不可逆性灌注缺损５例；再注射显像显示可逆性灌注缺损１８例，不可逆性灌注缺损２例．节段分析显示，“即刻”显像９３个心肌节段灌注异常，其中４小时“再分布”显像显示可逆性灌注缺损２７个节段（部分“再分布”１３个节段，完全“再分布”１４个节段）；再注射显像均为可逆性灌注缺损；“再分布”显像为不可逆性灌注缺损６６个节段，其中２５个节段（３８％）再注射显像表现为再充填，４１个节段仍为不可逆性灌注缺损．结论：再注射２０１Ｔ１心肌ＳＰＥＣＴ显像检测缺血存活心肌的灵敏度优于２０１Ｔ１“再分布”显像．
20 patients with coronary heart disease (19 cases of myocardial infarction) 201T1 reperfusion myocardial SPECT imaging to assess its value of detecting myocardial ischemia survived. Methods: All patients undergoing peak exercise at 201 were divided into two groups: immediate, 4-hour “redistribution” and re-injection SPECT. Results: Immediately after exercise, 20 patients showed abnormal myocardial perfusion imaging. In 4 hours, “redistribution” imaging showed reversible perfusion defects in 15 cases and irreversible perfusion defects in 5 cases. Reperfusion injections showed that 18 cases had reversible perfusion defects, Irreversible perfusion defect in 2 cases. Segmental analysis showed “immediate” imaging of 93 segments of myocardial perfusion abnormality, with 4 hours of “redistribution” imaging showing reversible perfusion of 27 segments (partial “redistribution” of 13 segments, complete “ Distribution ”of 14 segments); reperfusion imaging were reversible perfusion defects;“ redistribution ”imaging was irreversible perfusion defect 66 segments, of which 25 segments (38%) re-injection imaging showed Refill, 41 segments are still irreversible perfusion defect. Conclusion: The sensitivity of 201T1 myocardial SPECT imaging after myocardial injections is better than 201T1 “redistribution” imaging.