Power spectral density of heart rate variability as an index of sympatho-vagal interaction in normal and hypertensive subjects.
J Hypertens Suppl
; 2(3): S383-5, 1984 Dec.
Article
en En
| MEDLINE
| ID: mdl-6599685
Instantaneous heart rate reflects sympatho-vagal influences on pace-maker activity. Hence computer analysis of heart rate variability might provide a quantitative index of that interaction. The power spectral density (PSD) estimate of heart rate variability was obtained in normal controls and in uncomplicated hypertensives, both at rest and during a non-hypotensive sympathetic stimulus (tilting). In normal controls PSD shows three major peaks of frequencies P1 = 0.07, P2 = 0.12, P3 = 0.25 cycles/beat. P1, which is associated with sympathetic activity, represents only a minor portion of total variability at rest, while becoming predominant with tilting. P2 and P3 are associated with vagal activity, and represent the major part of variability at rest, while they are reduced by tilting. In hypertensive patients PSD is altered, as P1 is already predominant at rest and increases only slightly with tilting. Thus PSD of heart rate variability is capable of detecting an early alteration in sympatho-vagal balance of cardiac control present in uncomplicated hypertension.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sistema Nervioso Simpático
/
Nervio Vago
/
Frecuencia Cardíaca
/
Hipertensión
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
J Hypertens Suppl
Asunto de la revista:
ANGIOLOGIA
Año:
1984
Tipo del documento:
Article
Pais de publicación:
Reino Unido