心率与P波振幅关系探讨

Relationship between heart rate and P wave amplitude

目的探讨心率与P波振幅的关系。方法随机选取我院接受24 h动态心电图(Holter)检查的患者最快、最慢心率的Holter截图245例,分别测量心率和P波振幅,计算不同心率范围P波振幅的平均值,比较均值之间的差别,分析P波振幅改变的原因。结果心率超过120次/min时的P波振幅与120次/min以下有显著差别。P波振幅增大与右房肥大、肺动脉高压相关性较弱。结论心率大于120次/min的P波振幅增大多为交感神经张力增高所致。

Objective To explore the relationship between heart rate and the amplitude of P wave.Methods Two hundred and forty-five patients examined by 24 h ambulatory electrocardio-graphy（Holter）in our hospital were randomly selected.Based on their Holter screenshots including the fastest and the slowest heart rate,the heart rates and P wave amplitudes were measured separately, and the average values of P wave amplitudes in different ranges of heart rates were calculated and compared.The reasons for the changes of P wave amplitudes were analysed.Results There was significant difference between the P wave amplitude at a heart rate over 120 beats/min and the one at a heart rate below 120 beats/min.And there was no obvious correlationship between the increase of P wave amplitude and right atrial enlargement or pulmonary artery hypertension.Conclusion When heart rate is over 120 beats/min,the increase of P wave amplitude mainly results from elevated autonomic nerve tension.