A COMPARATIVE STUDY TO ANALYSE THE PR ,QT, R-R INTERVAL, BETWEEN MALES AND FEMALES IN BASELINE ECG IN HEALTHY YOUNG ADULTS

Abstract

Background Gender difference have some impact on Baseline ECG in healthy young adults. While recording baseline ECG as a routine health check up , it should be kept in mind that prolonged PR interval in males and short R-R interval in females could be possible . So the study was undertaken to observe the gender differences in PR interval, R-R interval and QT interval in normal young adults. Aim objective To observe the differences in PR interval, QT interval, R-R interval in baseline ECG among males and females in healthy young individuals. Materials A total of 100 healthy students (50 males and 50 females) in the age group of 18-25 years were included in the study. They were screened by history and complete clinical examination to   exclude cardiovascular and other abnormalities. Methodology Lead 2 ECG was taken using standardized ECG machine. PR interval, QT interval, R-R interval were measured using standard guidelines and calculated on average of five consecutive beats. QTc interval was obtained by using Bazetts formula. Result The results were statistically analyzed using unpaired t test. The mean PR interval value for males is( 0.18) higher than that of females (0.14) which is statistically significant (P0.0001). Mean QTc interval for males is (0.39) and for females is (0.38 ), the difference is not statistically significant ( P 0.6621). Mean R-R interval for males is (0.89) and for females is (0.54), the   difference is statistically significant (P0.0001). Discussion Differences in Atrioventricular nodal anatomy, autonomic tone and ventricular muscle mass are the explainable reasons for gender variation in PR interval. High sympathetic tone and basal metabolism are reasons for short R-R interval in females.  Conclusion It was observed that gender differences have some impact on PR interval and R-R interval ( Heart Rate ) not on QT interval. PR interval and R-R interval both are more prolonged in males when compared to females.