【摘要】 目的 观察长期吸烟对QT间期及QT离散度的影响。方法 将140例健康志愿者分为吸烟组及对照组，每组各70例，常温下采集静息12导联心电图，其QT间期及QT离散度，两组间比较用配对t检验，P<0.05，有统计学意义。结果 吸烟组比对照组在肢体导联二(D2)及V2的QT间期明显延长，分别为(405±34)ms与(367±25)ms，P<0.05，及(413±36)ms与(382±27)ms，P<0.05。吸烟组比对照组的QT离散度明显增加(50±16)ms与(34±11)ms(P<0.05)。结论 长期吸烟可使健康者的QT间期延长，QT离散度明显增加。

    【关键词】 吸烟；QT间期；QT离散度

    Effect of habitual smoking on QT interval duration and dispersion

    HUANG Zhi-hua,FAN Rui-yun.

    Cardiovasculur Deparment, 266th Hospital of PLA,Chengde 067000,China

    【Abstract】 Objective To exam the effect of habitual smoking on QT interval duration and dispersion.Methods 140 healthy volunteers were individed into smoking and control groups,every group include 70 cases.A routine standard 12-lead surface electrocardiogram recorded at rest.QT

    interval d duration and QT dispersion were measured.Comparison between smokers and nonsmokers was performed with the unpaired t test,P<0.05 was considered significant.Results QT interval duration in D2 and V2 were significantly longer in smokers than in nonsmokers (405±34vs 367±25ms) ......