Objective To analyse the effects of rapid atrial pacing on P wave duration and dispersion.
目的分析快速心房刺激对P波时限及离散度的影响。
Methods: We measured the maximum P-wave duration and P-dispersion from the 12-lead surface electrocardiogram of 40 patients with IPAF and 40 age-matched healthy control subjects.
方法：对确诊IPAF病例和年龄匹配的健康人各40例，测量体表心电图12导联最大P波时限及P波离散度。
The surface body electrocardiogram(ECG) manifestations of biatrial pacing are that P wave duration shortens, the polarity of P wave changes to negative, PR interval gets shorter correspondingly.
双房同步起搏体表心电图表现为P波时限短、负向或正负双向，PR间期相应缩短。
Conclusion The extent of atrial fibro sis was increased in abdominal aorta banded rats. Although longer P wave duration and IACT are present, there is no change in atrial effective refractory period.
结论腹主动脉结扎大鼠心房纤维化程度增加，P波时限增宽，IACT延长，心房有效不应期没有改变。
Conclusion The extent of atrial fibro sis was increased in abdominal aorta banded rats. Although longer P wave duration and IACT are present, there is no change in atrial effective refractory period.
结论腹主动脉结扎大鼠心房纤维化程度增加，P波时限增宽，IACT延长，心房有效不应期没有改变。
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