Epidemiological Features Of J Wave In The Communities Population And Ischemia J Wave In Coronary Heart Disease Patient

Objective Investigating the epidemic status of J wave of ECG in the communities of Taiyuan city in order to provide basic date for studying ischemic J wave.Methods 4041 subjects ranged from 35 to 75 years old in the maturated communities of Taiyuan city were selected and 12-lead ECG was recorded. The J waves in Five lead-groups:ⅡⅢaVF, V1V2, V3V4, V5V6 and I aVL were insured respectively and classified into three grades:little (time course was 0.02-0.04s or wave amplitude was 0.05-0.10mv), large (time course was 0.04-0.06s or wave amplitude was 0.10-0.20mv) and enormous (time course was >0.06s or wave amplitude was>0.20mv) J waves. The incidence rate of J wave was calculated and compared between gender, age, different leads and basic diseases.Results The incidence rate of J wave was 18.00% in whole 4041 population. Sex was no difference (malel7.81% vs famale18.09%,χ2=0.05, p>0.05). Age stage ranged from 55 to 64 were 20.15%, which increased significantly than other age stage groups (age stage 35-44 were 14.60%,45-54 were 14.73%,65-75 were 13.40%,χ2=30.02, p<0.001). There were 1048 people complicated with mainly basic diseases (including hypertension, diabetes, stroke and angina pectoris). The incidence rate of J wave in people complicated with mainly basic diseases increased significantly than people without mainly basic diseases (22.88% vs 16.28%,χ2=22.95, p<0.001);The little J waves occupied the highest proportion of 92.05% in all the three grades and J waves in V5V6 lead occupied the highest proportion of 34.20% in all the ECG leads.Conclusions The natural incidence rate of J wave presented high level in Taiyuan city, associated with age but had no sex difference. Furthermore, The incidence rate of J wave in complicated with mainly basic diseases population increased significantly. The low-grade J waves and lateral wall occupied the highest proportion respectively in all the J waves and ventricular walls. Objective To investigate the characteristic of ischemia J wave in the patients with coronary heart disease (CHD) and explore its clinical significance.Methods The ECG data of 473 patients (ranged from 35 to 75 years old, average age 59±11 years old; 317 males,156 famales) who were performed with coronary arteriography (CAG) in the cardiology department of the second hospital of Shanxi medical univeristy were Retrospectively analyzed. (1) According to the results of CAG and clinical diagnosis, the patients were divided into CHD and non-CHD group. The incidence rate of J wave were investigated and compared between gender, age and different leads in the two groups.(2) According to the results of myocardial infarction (MI), the CHD patients were divided into MI and angina group (all were unstable angina and had no MI) and the incidence rate of J wave were compared between the two groups.(3) According to the results of ECG, the CHD patients were divided into J waves and non-J waves group. The score of coronary stenosis, amount and constituent ratio of coronary stenosis branch were calculated and compared between the two groups.Results (1) The incidence rate of J wave had no significant difference between the CHD and non-CHD group. The incidence rate of J wave had no significant gender difference in the CHD group (P>0.05) while had significant gender difference in the non-CHD group (χ2=3.986, P=0.046<0.05). Age stage ranged from 50 to 69 andⅡⅢaVF lead occupied the highest proportion in all the age stage groups and leads of the patient in CHD group. (2) The incidence rate of J wave in angina group increased significantly than MI group in all the CHD patients (x2 =6.161, P=0.013<0.05). (3) There were no significant difference in score of coronary stenosis (3.56±2.88 vs 3.79±3.17, t=0.56, P=0.58>0.05) and amount of coronary stenosis branch(24:19:15 vs 105:70:84, P=0.544>0.05) between J waves and non-J waves group. The descending anterior branch occupied the highest proportion of 39.82% and 40.54% respectively in all the branches of the two groups.Conclusion The incidence rate of J wave in CHD group had no significant difference with the non-CHD group and the age ranged from 45-54 years occupied the highest proportion in all CHD patients. The incidence rate of J wave in angina patients (had no MI) increased significantly than MI patients in all CHD patients. The core of coronary stenosis and amount of coronary stenosis branch in patients whose ECG had J waves had no difference with non J waves patient.