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Spectral analysis of heart rate dynamics in elderly persons with postprandial hypotension.
Am J Cardiol. 1992 Jan 15; 69(3):201-5.AJ

Abstract

Prior studies suggest that postprandial hypotension in elderly persons may be due to defective sympathetic nervous system activation. We examined autonomic control of heart rate (HR) after a meal using spectral analysis of HR data in 13 old (89 +/- 6 years) and 7 young (24 +/- 4 years) subjects. Total spectral power, an index of overall HR variability, was calculated for the frequency band between 0.01 and 0.40 Hz. Relatively low-frequency power, associated with sympathetic nervous system and baroreflex activation, was calculated for the 0.01 to 0.15 Hz band. High-frequency power, representing parasympathetic influences on HR, was calculated for the 0.15 to 0.40 Hz band. Mean arterial blood pressure declined 27 +/- 8 mm Hg by 60 minutes after the meal in elderly subjects, compared with 9 +/- 8 mm Hg in young subjects (p less than or equal to 0.0001, young vs old). The mean change in low-frequency HR power from 30 to 50 minutes after the meal was +19.4 +/- 25.3 U in young subjects versus -0.1 +/- 1.5 U in old subjects (p less than or equal to 0.02). Mean change in total power was also greater in young (19.0 +/- 26.6 U) subjects compared with old subjects (0.0 +/- 1.6 U, p greater than or equal to 0.02). Mean ratio of low:high-frequency power increased 3.1 +/- 3.3 U in young subjects vs 0.5 +/- 2.7 U in old subjects (p less than or equal to 0.01). The increase in low-frequency HR power and in the low:high frequency band ratio in young subjects is consistent with sympathetic activation in the postprandial period.(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Department of Medicine, Beth Israel Hospital, Boston, Massachusetts.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

1731460

Citation

Ryan, S M., et al. "Spectral Analysis of Heart Rate Dynamics in Elderly Persons With Postprandial Hypotension." The American Journal of Cardiology, vol. 69, no. 3, 1992, pp. 201-5.
Ryan SM, Goldberger AL, Ruthazer R, et al. Spectral analysis of heart rate dynamics in elderly persons with postprandial hypotension. Am J Cardiol. 1992;69(3):201-5.
Ryan, S. M., Goldberger, A. L., Ruthazer, R., Mietus, J., & Lipsitz, L. A. (1992). Spectral analysis of heart rate dynamics in elderly persons with postprandial hypotension. The American Journal of Cardiology, 69(3), 201-5.
Ryan SM, et al. Spectral Analysis of Heart Rate Dynamics in Elderly Persons With Postprandial Hypotension. Am J Cardiol. 1992 Jan 15;69(3):201-5. PubMed PMID: 1731460.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Spectral analysis of heart rate dynamics in elderly persons with postprandial hypotension. AU - Ryan,S M, AU - Goldberger,A L, AU - Ruthazer,R, AU - Mietus,J, AU - Lipsitz,L A, PY - 1992/1/15/pubmed PY - 1992/1/15/medline PY - 1992/1/15/entrez KW - NASA Discipline Cardiopulmonary KW - Non-NASA Center SP - 201 EP - 5 JF - The American journal of cardiology JO - Am J Cardiol VL - 69 IS - 3 N2 - Prior studies suggest that postprandial hypotension in elderly persons may be due to defective sympathetic nervous system activation. We examined autonomic control of heart rate (HR) after a meal using spectral analysis of HR data in 13 old (89 +/- 6 years) and 7 young (24 +/- 4 years) subjects. Total spectral power, an index of overall HR variability, was calculated for the frequency band between 0.01 and 0.40 Hz. Relatively low-frequency power, associated with sympathetic nervous system and baroreflex activation, was calculated for the 0.01 to 0.15 Hz band. High-frequency power, representing parasympathetic influences on HR, was calculated for the 0.15 to 0.40 Hz band. Mean arterial blood pressure declined 27 +/- 8 mm Hg by 60 minutes after the meal in elderly subjects, compared with 9 +/- 8 mm Hg in young subjects (p less than or equal to 0.0001, young vs old). The mean change in low-frequency HR power from 30 to 50 minutes after the meal was +19.4 +/- 25.3 U in young subjects versus -0.1 +/- 1.5 U in old subjects (p less than or equal to 0.02). Mean change in total power was also greater in young (19.0 +/- 26.6 U) subjects compared with old subjects (0.0 +/- 1.6 U, p greater than or equal to 0.02). Mean ratio of low:high-frequency power increased 3.1 +/- 3.3 U in young subjects vs 0.5 +/- 2.7 U in old subjects (p less than or equal to 0.01). The increase in low-frequency HR power and in the low:high frequency band ratio in young subjects is consistent with sympathetic activation in the postprandial period.(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0002-9149 UR - https://www.unboundmedicine.com/medline/citation/1731460/Spectral_analysis_of_heart_rate_dynamics_in_elderly_persons_with_postprandial_hypotension_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0002-9149(92)91305-N DB - PRIME DP - Unbound Medicine ER -