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对象和方法:正常组265例,心肌梗塞(MI)组151例、左室肥大组60例、右室肥大组44例、右束支阻滞(RBBB)组47例、左束支阻滞(LBBB)组14例、预激综合征18例。另外,心电图上从V_1~-～V_3~-呈rs型,且R振幅<0.3mV者作为PRWP(Poor R wave Progression)组。其中PRWP正常组30例,PRWP前壁中隔梗塞组20例,PRWP左室肥大组15例。使用Frank导联记录上述各组对
Subjects and Methods: A total of 265 patients in the normal group, 151 in the myocardial infarction group (MI), 60 in the left ventricular hypertrophy group, 44 in the right ventricular hypertrophy group, 47 in the right bundle branch block (RBBB) group, LBBB) group of 14 cases, pre-excitation syndrome in 18 cases. In addition, ECG from V_1 ~ - ~ V_3 ~ rs type, and R amplitude <0.3mV PRWP (Poor R wave Progression) group. Among them, 30 cases of PRWP normal group, 20 cases of PRWP anterior septal infarction group and 15 cases of PRWP left ventricular hypertrophy group. Use the Frank lead to record each of the above pairs