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[The effect of orthostatic provocation on the spectral pattern of heart rate variability in healthy subjects].
Przegl Lek. 1996; 53(7):534-9.PL

Abstract

Investigations were carried out in 74 persons (32 female and 42 male, mean age: 39.7 +/- 10.0 years, range: 16 to 68 years) free of diseases known to affect autonomic function. After a quarter of rest in quite, air conditioned room, while on voluntary breathing in supine, and later on in vertical position, time-series of a few minutes of successive R-R intervals were collected in each person and than stored for further off line analysis. Multivariate autoregressive modeling approach with parametric decomposition of peaks has given a basis for computation of spectral power of heart rate variability. In each body position 150 seconds long, stationary epoch of R-R intervals free of ectopy and artifacts were selected, and spectral power were calculated in three frequency bands: very low frequency (VLF): below 0.03 Hz (rejected from further analysis), low frequency (LF): from 0.03 to 0.15 Hz, and high frequency (HF): 0.15 to 0.35 Hz. Than, computed powers were expressed in either absolute units, or as normalized values, that is as percentages of total power less VLF. Breathing was also monitored in each case and spectral characteristics of its frequency also given in ranges defined for heart rate variability. In vertical, as compared to supine position, mean R-R interval decreased: 856 +/- 119 ms vs. 695 +/- 111 ms (p < 0.0005). The power of LF increased: 8.1 +/- 7.3 BPM2 vs. 19.2 +/- 14.6 BPM2, (p < 0,005), and simultaneously the power of HF dropped: 4.7 +/- 3.6 BPM2 vs. 2.7 +/- 2.5 BPM2, (p < 0.0005). In normalized units LF power enhanced: 63 +/- 385 vs. 87 +/- 42%, (p < 0.0005), and HF dropped: 36.7 +/- 32% vs. 12.3 +/- 12%, (p < 0.0005). Autonomic balance expressed as LF/HF ratio was higher in vertical position: 2.0 +/- 1.6 vs. 11.0 +/- 8.7, (p < 0.0005). In 73 out of 74 subjects (98.6%) the power of LF increased, and in 71 (95.9%)-decreased. In one person who had lower power of LF in vertical than supine position, the increase of HF power was noticed. Mean percentage increase of LF in the whole group was 209.4 +/- 243%, but after rejection of the result mention above the mean value increased to 218 +/- 22.1%. Mean percentage decrease of HF power in the whole group was 34.7 +/- 37.7%, and increased to 39.5 +/- 26.9% after rejection of three results with changes in opposite direction. Mean values of respiratory power did not change with switching of posture neither in LF:14.4 +/- 6.6% vs. 17.8 +/- 7.1%, (NS), nor in HF: 77.7 +/- 9.2% vs. 73.6 +/- 12.1%, (NS).

Authors+Show Affiliations

Rozentryt P
1Z Pracowni Elektrokardiografil Szpitala Klinicznego nr 1 w Lodzi.
Trzos G
No affiliation info available
Strłojewski D
No affiliation info available
Kozlowski JW
No affiliation info available
Maciejewski M
No affiliation info available

MeSH

AdolescentAdultAgedElectrocardiographyFemaleHeart RateHumansMaleMiddle AgedMultivariate AnalysisPostureReference ValuesRegression AnalysisSignal Processing, Computer-Assisted

Pub Type(s)

Clinical Trial
English Abstract
Journal Article

Language

pol

PubMed ID

8975288

Citation

Rozentryt, P, et al. "[The Effect of Orthostatic Provocation On the Spectral Pattern of Heart Rate Variability in Healthy Subjects]." Przeglad Lekarski, vol. 53, no. 7, 1996, pp. 534-9.
Rozentryt P, Trzos G, Strłojewski D, et al. [The effect of orthostatic provocation on the spectral pattern of heart rate variability in healthy subjects]. Przegl Lek. 1996;53(7):534-9.
Rozentryt, P., Trzos, G., Strłojewski, D., Kozlowski, J. W., & Maciejewski, M. (1996). [The effect of orthostatic provocation on the spectral pattern of heart rate variability in healthy subjects]. Przeglad Lekarski, 53(7), 534-9.
Rozentryt P, et al. [The Effect of Orthostatic Provocation On the Spectral Pattern of Heart Rate Variability in Healthy Subjects]. Przegl Lek. 1996;53(7):534-9. PubMed PMID: 8975288.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [The effect of orthostatic provocation on the spectral pattern of heart rate variability in healthy subjects]. AU - Rozentryt,P, AU - Trzos,G, AU - Strłojewski,D, AU - Kozlowski,J W, AU - Maciejewski,M, PY - 1996/1/1/pubmed PY - 1996/1/1/medline PY - 1996/1/1/entrez SP - 534 EP - 9 JF - Przeglad lekarski JO - Przegl Lek VL - 53 IS - 7 N2 - Investigations were carried out in 74 persons (32 female and 42 male, mean age: 39.7 +/- 10.0 years, range: 16 to 68 years) free of diseases known to affect autonomic function. After a quarter of rest in quite, air conditioned room, while on voluntary breathing in supine, and later on in vertical position, time-series of a few minutes of successive R-R intervals were collected in each person and than stored for further off line analysis. Multivariate autoregressive modeling approach with parametric decomposition of peaks has given a basis for computation of spectral power of heart rate variability. In each body position 150 seconds long, stationary epoch of R-R intervals free of ectopy and artifacts were selected, and spectral power were calculated in three frequency bands: very low frequency (VLF): below 0.03 Hz (rejected from further analysis), low frequency (LF): from 0.03 to 0.15 Hz, and high frequency (HF): 0.15 to 0.35 Hz. Than, computed powers were expressed in either absolute units, or as normalized values, that is as percentages of total power less VLF. Breathing was also monitored in each case and spectral characteristics of its frequency also given in ranges defined for heart rate variability. In vertical, as compared to supine position, mean R-R interval decreased: 856 +/- 119 ms vs. 695 +/- 111 ms (p < 0.0005). The power of LF increased: 8.1 +/- 7.3 BPM2 vs. 19.2 +/- 14.6 BPM2, (p < 0,005), and simultaneously the power of HF dropped: 4.7 +/- 3.6 BPM2 vs. 2.7 +/- 2.5 BPM2, (p < 0.0005). In normalized units LF power enhanced: 63 +/- 385 vs. 87 +/- 42%, (p < 0.0005), and HF dropped: 36.7 +/- 32% vs. 12.3 +/- 12%, (p < 0.0005). Autonomic balance expressed as LF/HF ratio was higher in vertical position: 2.0 +/- 1.6 vs. 11.0 +/- 8.7, (p < 0.0005). In 73 out of 74 subjects (98.6%) the power of LF increased, and in 71 (95.9%)-decreased. In one person who had lower power of LF in vertical than supine position, the increase of HF power was noticed. Mean percentage increase of LF in the whole group was 209.4 +/- 243%, but after rejection of the result mention above the mean value increased to 218 +/- 22.1%. Mean percentage decrease of HF power in the whole group was 34.7 +/- 37.7%, and increased to 39.5 +/- 26.9% after rejection of three results with changes in opposite direction. Mean values of respiratory power did not change with switching of posture neither in LF:14.4 +/- 6.6% vs. 17.8 +/- 7.1%, (NS), nor in HF: 77.7 +/- 9.2% vs. 73.6 +/- 12.1%, (NS). SN - 0033-2240 UR - https://www.unboundmedicine.com/medline/citation/8975288/[The_effect_of_orthostatic_provocation_on_the_spectral_pattern_of_heart_rate_variability_in_healthy_subjects]_ DB - PRIME DP - Unbound Medicine ER -