Changes and significance of echocardiography and QRS fragmented wave in patients with acute myocardial infarction
Zhao Lin
Zhu Xiaohu
Wei Qian
Cai Guocai
Abstract：Objective To investigate the detection and significance of QRS fragmented wave (fQRS) in examinations of echocardiography and electrocardiogram (ECG) in patients with acute myocardial infarction (AMI). Methods The patients (n=113) with suspected AMI undergone coronary angiography (CAG) were chosen from the First Affiliated Hospital of Chengdu Medical College from May 2013 to May 2016, and then divided, according to the outcomes of CAG, into AMI group (n=84) and non-AMI group (n=29). The conditions of echocardiograph and fQRS of ECG were analyzed in 2 groups before treatment. The subgroup analysis was as follows: AMI patients (n=84) were divided into group of patients (<50%) with fQRS+LVEF (group A), group of patients (≥50%) with fQRS+LVEF (group B) and group of patients without fQRS (group C). The indexes of left ventricular end-diastolic inner diameter (LVEDD) and left ventricular ejection fraction (LVEF) were detected by using echocardiography, fQRS was detected by using ECG, and lesion vessels and severity of coronary artery were detected by using CAG.Results There were 84 cases in AMI group (average age=65.2±9.7), and 29 cases with hypertension, 14 with diabetes and 27 with smoking history. There were 29 cases in non-AMI group (average age=63.8±10.4), and 9 with hypertension, 4 with diabetes and 8 with smoking history. The difference n age, sex, complications and smoking history had no statistical significance between 2 groups (P>0.05). Compared with non-AMI group, LVEDD was higher and LVEF was lower in AMI group (P<0.05), and detection rate of fQRS was higher in AMI group than that in non-AMI group (65.48%vs. 34.49%,P<0.05). The rate of multi-vessel lesion was significantly higher in group A (93.94%) than that in group B (68.18%) and group C (27.59%,P<0.05), and that was significantly higher in group B (68.18%) than that in group C (27.59%,P<0.05). The rate of total occlusion was significantly higher in group A (48.18%) than that in group B (13.64%) and group C (3.45%, allP<0.05). The difference in rate of total occlusion had no statistical significance between group B (13.64%) and group C (3.45%,P>0.05).Conclusion The incidence of fQRS increases and heart function decreases and they are related to disease degree in AMI patients.
Keywords：EchocardiographyElectrocardiogramQRS fragmented waveAcute myocardial infarction
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1240-1242,1246 )