The National Research Centre for the Working Environment, Lersø Parkallé 105, DK-2100 Copenhagen, Denmark.
Biomed Eng Online. 2011 Apr 12;10:27. doi: 10.1186/1475-925X-10-27.
A number of small portable systems that can measure HRV are available to address questions related to autonomic regulation in free-living subjects. However, ambulatory HRV measurements obtained through use of these systems have not previously been validated against standard clinical measurements such as Holter recordings. The objective of this study was to validate HRV obtained using a commonly used system, Actiheart, during occupational and leisure-time activities.
Full-day ambulatory electrocardiography (ECG) signals were recorded from 8 females simultaneously using Actiheart and Holter recorders, and signals were processed to RR-interval time series. Segments of 5-minute duration were sampled every 30 minutes, and spectral components of the heart rate variability were calculated. Actiheart and Holter values were compared using Deming regression analysis and Bland-Altman plots.
In total, 489 segments were available with an HRV value from both Actiheart and Holter recordings after filtering out segments with >10% interpolated beats. No systematic differences between Actiheart and Holter HRV were found. The random deviations between Actiheart and Holter were comparable to the repeatability standard deviation between consecutive Holter measurements.
The results show that Actiheart is suited as a stand-alone ambulatory method for heart rate variability monitoring during occupational and leisure-time activities.
有许多小型便携式系统可用于测量 HRV，以解决与自主调节相关的问题，这些系统适用于自由生活的个体。然而，通过这些系统进行的动态 HRV 测量以前并未经过标准临床测量（如 Holter 记录）的验证。本研究的目的是验证 Actiheart 系统在职业和休闲活动期间获得的 HRV。
使用 Actiheart 和 Holter 记录仪同时记录 8 名女性全天的动态心电图信号，并对 RR 间期时间序列进行处理。每隔 30 分钟采集 5 分钟时长的片段，并计算心率变异性的频谱成分。使用 Deming 回归分析和 Bland-Altman 图比较 Actiheart 和 Holter 的值。
总共获得了 489 个片段，这些片段都经过滤波去除了>10%的插补心搏，之后可以从 Actiheart 和 Holter 记录中获得 HRV 值。未发现 Actiheart 和 Holter HRV 之间存在系统差异。Actiheart 和 Holter 之间的随机偏差与连续 Holter 测量之间的重复性标准差相当。
结果表明，Actiheart 适合作为一种独立的动态心率变异性监测方法，用于职业和休闲活动期间。
