Features and clinical value of PR segment deviation in ECGC

Objective To investigate the features and clinical value of PR segment deviation in ECG.Methods Measuring magnitude of PR segment and ST segment deviation in all lead of ECG recorded first in 68 cases with PR segment deviation at different times,and observing characteristics of their clinical data.Results ① The directions of PR segment deviation with depression in the range of 0.05 ~ 0.15mV were opposite to the direction of ST segment deviation with elevation in the range of 0.05 ~ 0.10 mV;② In these 68 cases,there were 59 cases with acute pericarditis,including 13 cases with neoplastic pericarditis,10 cases with tuberculous pericarditis,8 cases with uremic pericarditis,7 cases accepted cardiac surgical,7 cases with suppurative pericarditis,5 cases with viral pericarditis,4 cases with autoimmune pericarditis and 4 cases with traumatic pericarditis,and in lead Ⅰ,Ⅱ,Ⅲ,aVL,aVF,V3 ~ V6 the PR segment depressed with ST segment elevation,but in lead aVR expressed as PR-segment elevation with ST segment depression;③ There were 9 cases with acute myocardial infarction combined with atrial infarction,in the leads which faced infarct region PR segment depressed with ST segment elevation,and in reciprocal leads the PR segment elevated and ST segment depression.Conclusion In ECG PR segment deviation strongly suggests acute pericarditis or atrial infarction.