Fragmented QRS Complex Myocardial Ischemia In The Cardiac Stress Test Center Evaluation

ObjectiveTo evaluate the predictive value of fragmented QRS complex (fQRS) to myocardialischemia by assessing fQRS before and after myocardial load test rupture; further toexplore the significance of changes of number of the lead with fQRS in the diagnosis ofcoronary artery disease and myocardial ischemia through the correlation research ofcoronary angiography results and fQRS.Materials and MethodsCollect the213cases of patients who accepted examinations including the coronaryangiography, heart color doppler echocardiograph, myocardial load test (plate movementexperiment) and12-lead couplet table resting electrocardiogram (ECG) fromcardiovascular medicine department of Shandong provincial Qianfoshan hospital fromJanuary2012to December2012. And according to the relevant standards to eliminateinterference causes, data from131patients were analyzed. Coronary angiography was usedto assess coronary artery disease. Patients were divided into two groups: group with fQRSand group without fQRS (nonfQRS) according to ECG. Coronary angiography was used toassess coronary artery disease, and it was divided into two groups according to fQRS wavein the motion tablet electrocardiogram QRS. Observe the QRS before and after exercisetest and the time of nomoral QRS to evaluate the predictive value of the lead numberchange to lesion vessels.Results1) fQRS complex in the CAD group and the comparison group of non-coronary heartdisease were significantly different, statistically significant(P<0.05).2) The lead number with fQRS complex in the CAD group and the comparison groupof non-coronary heart disease was different significantly (P<0.05).3）In the CHD group, the number of leads with fQRS change before and after theexercise treadmill test, χ~2=10.826, P=0.001(P <0.05) were different significantly. 4）In non-CHD group, the number of leads with fQRS change before and after theexercise treadmill test, χ~2=3.25, P=0.07(P>0.05), was not statistically significant.5）New fQRS number of leads in the CHD group compared with non-CAD group, χ~2=17.25, P=0.000(P <0.05) were significantly different.6）The time of fQRS wave group after exercise was longer than before exercise inthe CAD group, and the QRS wave was also different; in normal control group, there wereno significant changes in the fragmentation QRS duration as well as QRS wave group.Conclusion1) The number and new lead number with fQRS before and after the exercisetreadmill test complex has a predictive value of coronary artery stenosis.2) fQRS wave led to the change of the time and sequence of ventricular depolarizationtime.