长沙市人群心电图长(短)PR间期出现率及临床意义

Incidence of long(short) PR interval in electrocardiogram among healthy people in Changsha and its clinical significance

目的：探讨长沙市健康人群12导联体表心电图长（短）PR间期出现率及其临床意义。方法：选择1993年1月至2012年12月在中南大学湘雅二医院进行健康检查的4 025例自出生6 min至83岁长沙市人群,描记1 2导联体表心电图,测量心率、P R间期。采用SPSS 16.0软件对数据进行统计分析。结果：短P R间期出现率1 9.6 5%（7 9 1/4 0 2 5例）,1 4岁之前明显高于其他年龄组（χ-2=4 3 2,P〈0.0 1）,在出生至不足1个月、1个月至不足1岁达最高值（分别为4 3.2 9%,4 4.3 4%）,在1 4-1 7岁、4 0-4 9岁、5 0-5 9岁达最低值（分别为0.2 0%,0.4 1%,0.33%）。长PR间期出现率3.58%（144/4 025例）,在出生第1年达最高值（6.74%）,以后随年龄增加而逐渐下降,14-17岁达最低值（0.20%）,50岁以后又逐渐增高。长（短）PR间期总体男女性别差异未见统计学意义（P〉0.05）。结论：长（短）PR间期存在于健康人群中,儿童自主神经功能影响的心率及心房容积随年龄而改变,10岁前长（短）PR间期的发生率高于成人。成人出现长（短）PR间期需定期随访,避免心血管事件发生。

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（X-2=432,P0.0l）.The age groups from 1 month after birth and from 1 month to younger than 1 year-old displayed the highest incidences（43.29%and 44.34%,respectively）.The lowest incidences were obtained from the 14-17 year-old,40-49year-old and 50-59 year-old groups（0.20%,0.41%,and 0.33%,respectively）.The total incidence of long PR intervals was 3.58%（144/4 025）.The 1 year-old group had the highest incidence（6.74%）,which decreased with the increase of age.The lowest incidence of long PR intervals occurred in the age group from 14-17 years old,which gradually increased after 50 years old.There were no significant differences in long（short） PR intervals between the gender（P〉0.05）.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.