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负荷放射性核素血管造影(SRNA)诊断冠心病,迄今尚无公认的操作程序和判断标准。1983年10月至1986年4月间1500例胸痛者进行冠脉造影,同期290例作SRNA,排除各项因素,仅以二项检查相隔不到一个月的平均年龄55岁的96(男80、女16)例拟诊冠心病病人为对象,经冠脉造影,64例至少一支主支狭窄≥70％为冠心病,其中34例有心肌梗塞史,仰卧位下作踏车试验。记录静息、运动时和恢复期心电图,每3～5min增加负荷量30W,运动持续至出现下列某一表现:胸痛、严重心律失常或出现ST段水平型或下垂型压低0.1mV并持续0.08s,运动中无症状者运动心率必须达到年龄预期心率的80％。负荷试验的每一阶段作平衡法放射性核素(~((?)9m)锝标记的红细胞)心室造影,测定左室喷血分数(LVEF)。判断SRNA的标准如下:C_1为最常用的
Load radionuclide angiography (SRNA) diagnosis of coronary heart disease, so far there is no recognized operational procedures and criteria. Between October 1983 and April 1986, 1,500 patients with chest pain underwent coronary angiography and 290 patients with SRNA during the same period, all of which were excluded. Only the mean age of 55-year-old male patients aged less than a month was 96 , Female 16) cases of patients diagnosed with coronary heart disease as the object, by coronary angiography, 64 cases of at least one main stenosis ≥ 70% for coronary heart disease, 34 patients had a history of myocardial infarction, supine position for treadmill test. The rest, exercise and recovery ECGs were recorded. The load was increased by 30 W every 3 ~ 5 min. The exercise continued until one of the following symptoms occurred: chest pain, severe arrhythmia or horizontal depression or depression of ST segment 0.1 mV for 0.08 s , Exercise asymptomatic exercise heart rate must reach the age of 80% of the expected heart rate. Balanced radionuclide (~ (? 9m) technetium labeled erythrocytes) ventriculography was performed at each stage of the load test to determine left ventricular ejection fraction (LVEF). The criteria for judging SRNAs are as follows: C_1 is the most commonly used