| OBJECTIVE: To evaluate the clinical value of ischemic J wave through the study of clinical characteristics of acute myocardial infarction patients complicated with ischemic electrocardiographic J wave.METHODS:Retrospectively analyzing the clinical features of 72 ST-segment elevation acute myocardial infarction(AMI) patients who underwent coronary angiograpy (CAG),Percutaneous transluminal coronary angioplasty (PTCA) or stent (stent) intervention. According to the electrocardiogram(ECG) results,the patients were divided into J-wave group and non-J-wave group. 1,Appraised the differences of the basic clinical conditions , laboratory examination results and CAG results between the two groups(including age, incidence of time,markers of myocardial necrosis, the extent of coronary artery stenosis,the distribution of coronary artery and the account of coronary artery)whether or not of statistical significance. 2,Combined with the infarction-related artery (IRA) sites showed in the coronary angiography results, analyzed the relevance of J wave and coronary artery lesions.3,Compared the incidence and types of ventricular arrhythmias between two groups.RESULTS:1.The average time to onset hours of J-wave myocardial infarction group was(2.50±1.85) hours, the average notification time of non-J-wave group was (3.79±3.03) hours, so the time of the J-wave group was shorter than the control one (P=0. 028);J-wave group and the non-J-wave group in the aspects of age, LDH,CK,CK-MB,cTn,the extent of coronary artery stenosis,the distribution of coronary artery and the account of coronary artery showed no statistical significance (t=-2.242,P> 0.05).2.The right coronary artery disease of J-wave group were significantly more than that of non-J-wave group and the difference was statistically significant (χ2=14.553,P<0.001).3.The occurrence of ventricular arrhythmias in J-wave group was significantly higher than that of non-J-wave group (χ2 =3.880,P <0.05), with morphological changes,and the most common was for short formation ventricular tachycardia (32.4%),followed by frequent premature ventricular contractions (26.5%).CONCLUSION:J-wave group was significantly shorter time to non-J-wave group and more seen in the myocardial infarction prophase. The infarct-related artery of the patients who were troubled with acute myocardial infarction with ischemic J wave was mostly right coronary artery. Acute myocardial infarction complicated with ischemic J wave can make the incidence of malignant ventricular arrhythmia significantly increase.At this time, J-wave patterns were changeable. The most common was for frequent premature ventri- cular contractions, followed by short formation ventricular tachycardia. Ischem- ic J waves is a risk factor for sudden death warning. |
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