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目的建立健康老年人12导联同步心电图QT间期离散度平均值及其相关因素分析。方法对1028例65～95(69.4±17.3)岁健康老年人,用SR-1000A心电综合自动分析仪采集12导联同步体表心电图数据,并录入软盘,专人在显示器上进行回放分析。增益放大1mV=20～40mm,纸速放大50～100mm/s。测量QTmax、QTmin,按Bazett公式校正QTcmax、QTcmin,计算QTd(QTmax-QTmin)及QTcd(QTcmax-QTcmin)。微机数理统计。结果QTmax、QTmin、QTcmax、QTcmin、QTd及QTcd平均值随增龄呈增大趋势,但在年龄组间及男女间差别无统计学意义。65～95岁QTmax平均值为399.39±32.93ms,QTmin为364.99±31.06ms,QTcmax为445.87±28.21ms,QTcmin为406.60±29.84ms,QTd为33.97±11.15ms,QTcd为38.14±12.84ms。结论健康老年人各年龄QTd为12～50ms,QTcd为13～60ms。QTd与心率、年龄及性别无明显相关性。
Objective To establish an average QT interval dispersion of 12 - lead synchronous electrocardiogram in healthy elderly and its related factors. Methods A total of 1028 elderly patients aged 65-95 years old (69.4 ± 17.3 years old) were collected with 12-lead synchrocephaly electrocardiogram (ECG) data using the SR-1000A ECG automatic analyzer and recorded on a floppy disk. Gain amplification 1mV = 20 ~ 40mm, paper speed amplification 50 ~ 100mm / s. QTmax and QTmin are measured, QTcmax and QTcmin are corrected according to Bazett formula, and QTd (QTmax-QTmin) and QTcd (QTcmax-QTcmin) are calculated. Computer mathematical statistics. Results The average values of QTmax, QTmin, QTcmax, QTcmin, QTd and QTcd tended to increase with age, but there was no significant difference between age groups and between men and women. The average QTmax of 65-95 years old was 399.39 ± 32.93ms, the QTmin was 364.99 ± 31.06ms, the QTcmax was 445.87 ± 28.21ms, the QTcmin was 406.60 ± 29.84ms, the QTd was 33.97 ± 11.15ms and the QTcd was 38.14 ± 12.84ms. Conclusion The QTd of healthy elderly people is 12 ~ 50 ms for each age and 13 ~ 60 ms for QTcd. QTd and heart rate, age and gender no significant correlation.