健康特勤人员窦性P波电轴左偏特点分析  

Characteristics of left axis deviation of sinus P wave in healthy special agents

作　　者：戴伟川[1] 罗文秀[1] 胡惠[1] 赵銮姣[1] 

机构地区：[1]广州军区桂林疗养院,541003

出　　处：《中国疗养医学》2010年第6期487-488,共2页Chinese Journal of Convalescent Medicine

摘　　要：目的分析窦性P波电轴左偏特点,为确定窦性P波的外形特征提供参考依据。方法选取12导联同步记录心电图中有P波电轴左偏者83例,并与130例P波电轴正常者相比较。结果①两组受检者P波时限均<0.11s、P-R间期均>0.12s,PV5、V6均呈直立,PaVR均呈倒置。P波电轴左偏组平均心率为(61.7±7.6)bpm、正常组平均心率为(68.4±11.5)bpm。②P波电轴正常组电轴平均值为62.7°±10.1°,左偏组平均值为-17.3°±10.5°,其中-1°～-10°22例(26.5%)、-11°～-20°36例(43.4%)、-21°～-30°17例(20.5%)、-31°～-43°8例(9.6%)。③P波电轴正常组PII呈直立,振幅为(106.5±8.1)μV,左偏组PII振幅为(31.5±31.3)μV,PII呈平坦32例(38.6%)、平坦并切迹34例(41.0%)、正负双向12例(14.5%)、倒置5例(6.0%)。结论健康特勤人员P波电轴可以发生左偏,只要P-R间期>0.12s,并同时具备PaVR倒置和PV5、V6直立这两个条件,就是窦性P波。P波电轴左偏推测系迷走神经张力增高引起窦性激动部位移至窦房结尾部,导致激动在心房内传导顺序发生改变所致。Objective To analyze the characteristics of left axis deviation of sinus P wave,and provide a reference to determine the shape features of sinus P waves.Methods 83 cases of left axis deviation of sinus P wave recorded by 12-lead simultaneous electrocardiogram and 130 cases of normal axis of sinus P wave were selected and compared.Results ①Pmax〈0.11 s and PR interval 〉0.12 s in both group,PV5,V6 showed upright and PaVR inverted.The average heart rate was（61.7±7.6）bpm in the left axis deviation group and（68.4 ±11.5）bpm in the normal axis group.②The average value of axis was 62.7°±10.1°in the normal axis group and-17.3°±10.5°in the left axis deviation group,including 22 cases（26.5%） between-1°and-10°,36 cases（43.4%） between-11°and-20°,17cases（20.5%） between-21°and-30°,and 8 cases（9.6%）between-31°and-43°.③PII showed upright and the amplitude was（106.5 ± 8.1）μV in the normal axis group.The amplitude was（31.5±31.3）μV and PII showed flat in 32 cases（38.6%）,flat and notch 34 cases（41.0%）,positive and negative direction 12 cases（14.5%）and inversion 5 cases（6.0%） in the left axis deviation group.Conclusion Left axis deviation of sinus P wave may be found in healthy special agents.Sinus P wave requires PR interval〉0.12 s and two conditions such as PaVR inversion and upright PV5,V6.It is supposed that left axis deviation is caused by sequential change of lintra-atrial conduction of impulses,resulted from sinus impulse from location to tail of sinoatrial node due to increased pneumogastic nerve activity.

关 键 词：心电图 窦性P波 P波电轴左偏 特勤人员 

分 类 号：R541.7[医药卫生—心血管疾病]