Incidence of long (short) PR interval in electrocardiogram among healthy people in Changsha and its clinical significance / 中南大学学报(医学版)

ABSTRACT

OBJECTIVE@#To analyze the incidence of long (short) PR interval in electrocardiogram among healthy people in Changsha and the clinical significance.
@*METHODS@#Twelve-lead body surface electrocardiogram was taken to measure the heart rates and PR intervals from 4 025 healthy individuals (age range from 6 min after birth to 83 years old) who performed physical examination from Jan, 1993 to Dec, 2012 in the Second Xiangya Hospital, Central South University. Statistics were analyzed by SPSS 16.0.
@*RESULTS@#The total incidence of short PR interval was 19.65% (791/4 025). The age group from birth to 13 years old had a higher incidence than the other age groups (χ2=432, P0.05).
@*CONCLUSION@#The incidence of long (short) PR intervals varies in different age groups of healthy people. The incidences of long (short) PR intervals in children before 10 years old are higher than those in adults, especially the short PR intervals, as a result of the heart rate affected by childhood autonomic nervous function and the change in atrial volume with age. Adults have long (short) PR interval should be regularly followed-up to prevent cardiovascular events.