Please use this identifier to cite or link to this item:
https://www.arca.fiocruz.br/handle/icict/9437
Type
ArticleCopyright
Open access
Collections
- IFF - Artigos de Periódicos [1285]
Metadata
Show full item record
REPRODUCIBILITY OF HEART RATE VARIABILITY PARAMETERS MEASURED IN HEALTHY SUBJECTS AT REST AND AFTER A POSTURAL CHANGE MANEUVER
Author
Affilliation
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Centro Federal de Educação Tecnológica do Espírito Santo. Vitória, ES, Brasil.
Centro Federal de Educação Tecnológica do Espírito Santo. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Centro Federal de Educação Tecnológica do Espírito Santo. Vitória, ES, Brasil.
Centro Federal de Educação Tecnológica do Espírito Santo. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Universidade Federal do Espírito Santo. Departamento de Ciências Fisiológicas. Vitória, ES, Brasil.
Abstract
Heart rate variability (HRV) provides important information about cardiac autonomic modulation. Since it is a noninvasive and
inexpensive method, HRV has been used to evaluate several parameters of cardiovascular health. However, the internal repro-ducibility of this method has been challenged in some studies. Our aim was to determine the intra-individual reproducibility of
HRV parameters in short-term recordings obtained in supine and orthostatic positions. Electrocardiographic (ECG) recordings
were obtained from 30 healthy subjects (20-49 years, 14 men) using a digital apparatus (sampling ratio = 250 Hz). ECG was
recorded for 10 min in the supine position and for 10 min in the orthostatic position. The procedure was repeated 2-3 h later.
Time and frequency domain analyses were performed. Frequency domain included low (LF, 0.04-0.15 Hz) and high frequency
(HF, 0.15-0.4 Hz) bands. Power spectral analysis was performed by the autoregressive method and model order was set at 16.
Intra-subject agreement was assessed by linear regression analysis, test of difference in variances and limits of agreement. Most
HRV measures (pNN50, RMSSD, LF, HF, and LF/HF ratio) were reproducible independent of body position. Better correlation
indexes (r > 0.6) were obtained in the orthostatic position. Bland-Altman plots revealed that most values were inside the agree-ment limits, indicating concordance between measures. Only SDNN and NNv in the supine position were not reproducible. Our
results showed reproducibility of HRV parameters when recorded in the same individual with a short time between two exams.
The increased sympathetic activity occurring in the orthostatic position probably facilitates reproducibility of the HRV indexes.
Share