Litscher G, Schwarz G, Pfurtscheller G
AG für Biomedizinische Technik, Karl-Franzens-Universität Graz.
Biomed Tech (Berl). 1993 Apr;38(4):62-7. doi: 10.1515/bmte.1993.38.4.62.
Polysomnographic recordings were made in 10 healthy male adult subjects (mean age 25.1 +/- 2.8 years). Parameters were obtained from continuous non-invasive measurement of blood pressure and from heart rate spectra analysed both in the waking state and during sleep (stage 4). The total heart rate variability (mean +/- SE) was not significantly diminished (p < 0.2; paired t-test) during stage 4 sleep (6.2 +/- 0.5%) as compared with the waking state (7.1 +/- 0.5%). The relative heart rate variability coefficient within the frequency band HRV-II ((3-9)/min) was, however, significantly higher (p < 0.001) during slow-wave sleep (0.55 +/- 0.04) than during wakefulness (0.34 +/- 0.04). This fact is in accordance with results concerning an estimated value of the baroreflex sensitivity, which was also significantly higher (p < 0.001) during sleep stage 4 (7.0 +/- 0.8 ms/mmHg vs. 10.4 +/- 1.4 mmHg).
对10名健康成年男性受试者（平均年龄25.1±2.8岁）进行了多导睡眠图记录。参数取自清醒状态和睡眠（第4阶段）期间连续无创血压测量以及心率谱分析。与清醒状态（7.1±0.5%）相比，第4阶段睡眠期间总心率变异性（平均±标准误）没有显著降低（p<0.2；配对t检验）（6.2±0.5%）。然而，在慢波睡眠期间，HRV-II频段（(3 - 9)/分钟）内的相对心率变异系数显著高于清醒期间（p<0.001）（0.55±0.04比0.34±0.04）。这一事实与关于压力反射敏感性估计值的结果一致，压力反射敏感性在第4阶段睡眠期间也显著更高（p<0.001）（7.0±0.8毫秒/毫米汞柱对10.4±1.4毫米汞柱）。
