Application value of electrocardiographic fragmented QRS in the diagnosis of acute myocardial infarction

Objective To explore the application value of electrocardiographic fragmented QRS in the diagnosis of acute myocardial infarction, and to provide the basis for the ECG in the diagnosis of the disease. Method A retrospective analysis of 239 cases of coronary heart disease patients admitted to our hospital(including 102 cases of acute myocardial infarction in patients with clinical data), to the results of coronary angiography as the gold standard, of fragmented QRS complex, pathological Q wave and fragmentation of QRS and pathological Q wave sensitivity, specificity in diagnosis of acute myocardial infarction. Sensitivity and specificity compared the above electrocardiographic criteria in different parts of diagnosis of acute myocardial infarction. Result The sensitivity of fragmented QRS wave in diagnosis of acute myocardial infarction was 21.57%, compared to the pathologic Q wave, the difference was not statistically significant(P0.05), but the specificity and positive predictive value of fragmented QRS wave was 95.62% and 78.57%, were significantly higher than those of pathological Q wave(P 0.05). Sensitivity to fragmentation of QRS wave and Q wave in pathological diagnosis of acute myocardial infarction was 40.20%, significantly higher than that of fragmented QRS complex(P 0.05). Compared two indicators of specificity and positive predictive value, the difference was not statistically significant(P0.05). The sensitivity of fragmented QRS and pathological Q wave in the diagnosis of anterior wall and lateral wall myocardial infarction were significantly higher than that of fragmented QRS and pathological Q wave(P 0.05). Conclusion QRS can be used as an important index fragmentation in the diagnosis of acute myocardial infarction, and combined pathological Q wave diagnosis can further improve the ECG in the diagnosis of acute myocardial infarction.