Objective To analyze initial and re-examinations of ECGs among enlisted male youths excluding functional changes due to various adverse influencing factors so as to prevent adverse cardiac events after enlistment and ensure the selection of physically and psychologically qualified candidates for the military.Methods Retrospective analysis was performed in the ECG examination results of 2 065 enlisted male youths.The age range of the examines was 18 to 22 years with a mean of(20.0±1.5)years.According to ECG diagnostic criteria,ECG changes of initial and re-examinations were analyzed.Results Among the 2 065 enlisted male youths,abnormal ECGs were detected in 330 cases:sinus tachycardia in 30 cases(including 13 cases with concurrent ST-T changes),sinus bradycardia in 11 cases,premature beats in 19 cases,ST-T changes in 60 cases,early repolarization with elevated J point in 80 cases,right ventricular dominance in 12 cases,short PR interval in 56 cases,significant axis deviation in 10 cases,first-degree atrioventricular block in 25 cases,second-degree atrioventricular block in 1 case,left anterior fascicular block in 6 cases,atrial rhythm and atrial escape rhythm in 2 cases each,complete right bundle branch block in 12 cases,atrial fibrillation in 1 case,and ventricular pre-excitation in 3 cases.A week later,re-examination was performed in the 330 cases with abnormal ECGs out of whom 277 cases turned to be normal,including sinus tachycardia(including 11 cases with concurrent ST-T changes)in 28 cases(93.33%),sinus bradycardia in 11 cases(100%),premature beats in 17 cases(89.47%),ST-T changes in 56 cases(93.33%),early repolarization with elevated J point in 68 cases(85.00%),right ventricular dominance in 11 cases(91.67%),short PR interval in 50 cases(89.29%),significant axis deviation in 8 cases(80.00%),first-degree atrioventricular block in 22 cases(88.00%),left anterior fascicular block in 2 cases(33.33%),and atrial rhythm and atrial escape rhythm in 2 cases each(100%);the remaining cases were all unqualified in the re-examination.Except for second-degree atrioventricular block,left anterior fascicular block,complete right bundle branch block,atrial fibrillation and ventricular pre-excitation,there were statistically significant differences in the incidences of other ECG abnormalities between initial and re-examinations(all P<0.05).Conclusion Before physical examinations of enlisted male youths,they should correct unhealthy living habits and keep a positive attitude in advance.ECG physicians should patiently recheck unqualified ECGs to exclude functional changes before confirming unqualified ECG results.
enlisted male youthelectrocardiograminitial examinationre-examinationfunctional changes