| Objective â‘ To investigate the diagnostic value of 12-lead transtelephonicmonitoring(TTM)in myocardial ischemia. â‘¡ To investigate the diagnosticvalue of 12-lead TTM in silent myocardial ischemia(SMI). â‘¢ To investigatethe diagnostic value of electrocardiogram(ECG),treadmill movement test(TMT),TTM and Holter in myocardial ischemia. Methods â‘ Sixty subjects diagnosed by coronary angiography(CA)wereexamined by 12-lead TTM and ECG, to compare their sensitivity, specificityand validity , and analyze the relationships between the ST-segment depressionand the branches and severity of the lesions. â‘¡ forty patients diagnosed byCA were examined by 12-lead TTM and ECG. The duration of both methodswas less than one week. The data of 12-lead TTM is compared with ECG. â‘¢Sixty CHD patients diagnosed by CA were examined by ECG ,TMT,TTMand Holter. To compare and analyze the sensitivity,specificity and validity ofthem. Results â‘ The optimum ST-segment depression to diagnose myocardialischemia is 0.10mV. The ST-segment depression is related to myocardialischemia. â‘¡ The positive rate of 12-lead TTM and ECG in the diagnosis ofSMI is 63.64% and 9.09% respectively. There is an apparent difference betweenboth (p<0.05). â‘¢ The sensitivity of ECG ,TMT ,TTM and Holter is55.00%,71.43%,72.50%,70.00%; the specificity is 60.00%,76.92%,75.00%,75.00%; the validity is 56.67%,74.07%,73.33%,71.88%. To uniteTMT and TTM can improve the sensitivity to 85.71% and the specificity to84.62%. Conclusion â‘ The ST-segment depression of 12-lead TTM can provideevidence of myocardial ischemia and help for the further diagnosis andtreatment. â‘¡ 12-lead TTM can find out SMI early. It is helpful for SMI to betreated correctly. â‘¢ ECG ,TMT ,TTM and Holter are common andimportant non-invasive electrocardiographic diagnostic methods in myocardialischemia. |
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