Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Modulation of arterial baroreflex control of heart rate by skin cooling and heating in humans
Autore:
Yamazaki, F; Sone, R;
Indirizzi:
Univ Occupat & Environm Hlth, Dept Clin Pathophysiol, Sch Hlth Sci, Yahatanishi Ku, Kitakyushu, Fukuoka 8078555, Japan Univ Occupat & Environm Hlth Kitakyushu Fukuoka Japan 8078555 8555, Japan Yamaguchi Univ, Dept Exercise & Hlth Sci, Fac Educ, Yamaguchi 7530841, Japan Yamaguchi Univ Yamaguchi Japan 7530841 ac Educ, Yamaguchi 7530841, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 2, volume: 88, anno: 2000,
pagine: 393 - 400
SICI:
8750-7587(200002)88:2<393:MOABCO>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL VENOUS-PRESSURE; BLOOD-PRESSURE; BARORECEPTOR REFLEXES; SPECTRAL-ANALYSIS; RATE-VARIABILITY; RESPONSES; INCREASES; EXERCISE; VAGAL; TEMPERATURE;
Keywords:
aortic baroreceptors; carotid sinus baroreceptors; heart rate variability; power spectra; skin blood flow;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Yamazaki, F Univ Occupat & Environm Hlth, Dept Clin Pathophysiol, Sch HlthSci, Yahatanishi Ku, 1-1 Iseigaoka, Kitakyushu, Fukuoka 8078555, Japan Univ Occupat & Environm Hlth 1-1 Iseigaoka Kitakyushu Fukuoka Japan 8078555
Citazione:
F. Yamazaki e R. Sone, "Modulation of arterial baroreflex control of heart rate by skin cooling and heating in humans", J APP PHYSL, 88(2), 2000, pp. 393-400

Abstract

The purpose of this study was to examine the effects of skin cooling and heating on the heart rate (HR) control by the arterial baroreflex in humans. The subjects were 15 healthy men who underwent whole body thermal stress (esophageal temperatures, similar to 36.8 and similar to 37.0 degrees C; mean skin temperatures, similar to 26.4 and similar to 37.7 degrees C, in skincooling and heating, respectively) produced by a cool or hot water-perfused suit during supine rest. The overall arterial baroreflex sensitivity in the RR control was calculated from spontaneous changes in beat-to-beat arterial pressure and HR during normothermic control and thermal stress periods. The carotid baroreflex sensitivity was evaluated from the maximum slope ofthe HR response to changes in carotid distending pressure, calculated as mean arterial pressure minus neck pressure. The overall arterial baroreflex sensitivity at existing arterial pressure increased during cooling(-1.32 +/- 0.25 vs. -2.13 +/- 0.20 beats . min(-1) . mmHg(-1) in the control and cooling periods, respectively, P < 0.05), whereas it did not change significantly during heating (-1.39 +/- 0.23 vs. -1.40 +/- 0.15 beats . min(-1) . mmHg(-1) in the control and heating periods, respectively). Neither the cool nor heat loadings altered the carotid baroreflex sensitivity in the HR control. These results suggest that the sensitivity of HR control by the extracarotid (presumably aortic) baroreflex was augumented by whole body skin cooling, whereas the sensitivities of HR control by arterial baroreflex remain unchanged during mild whole body heating in humans.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 09:47:59