Diurnal variations in vagal and sympathetic cardiac control

Hayano, Junichiro; Sakakibara, Y; Yamada, Masami; Kamiya, Tetsuro; Fujinami, Takao; Yokoyama, Kenichi; Watanabe, Yukio; Takata, Kazuyuki

doi:10.1152/ajpheart.1990.258.3.h642

Cited by 89 publications

(71 citation statements)

References 19 publications

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“…[16][17][18][19] Two major spectral components, ie, a low-frequency component (0.04 to 0.15 Hz) and a high-frequency component (0.15 to 0.40) have been identified. [16][17][18][19] The low-frequency component reflects the Mayer waves, which are modulated by sympathetic neurons with vagal modulation, 20,21 increases when a person is standing, and is blocked by intravenously administered propranolol. 16,22,23 Thus the low-frequency component is believed to be an index of sympathetic activity.…”

Section: Discussionmentioning

confidence: 99%

The potent role of increased sympathetic tone in pathogenesis of essential hypertension with neurovascular compression

et al. 2000

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Objective: To study the role of increased sympathetic tone in pathogenesis of hypertension in patients with essential hypertension with neurovascular compression. Methods: Twenty-three patients with essential hypertension, 13 patients with secondary hypertension, and 46 normotensive subjects were investigated. Neurovascular compression was evaluated by MRT. The power spectral components of heart rate variability as indices of autonomic nerve tone were determined to investigate the possibility that sympathetic tone mediates the neurovascular compression-induced increase in blood pressure. Results: Neurovascular compression of the rostral ventrolateral medulla (RVLM) was observed in 70% of essential hypertension group, none of secondary hyperension group and 16% of normotensive group (P Ͻ 0.001). The age-adjusted low-frequency power spectral density (A-PSD) (0.04 to 0.15 Hz), which is an index of

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Section: Discussionmentioning

confidence: 99%

The potent role of increased sympathetic tone in pathogenesis of essential hypertension with neurovascular compression

et al. 2000

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“…Eating dynamically affects cardiovascular function and cardiac autonomic function (Hayano et al, 1990). The present findings show that HR was unchanged during fasting while it increased after the high-E high-F meal or moderate-E high-C meal, which contained 771 kcal and 519 kcal, respectively.…”

Section: Figmentioning

confidence: 99%

Effects of Modern Eating Patterns on the Cardiac Autonomic Nervous System in Young Japanese Males

Kuwahara

Okita

Kouda

et al. 2011

J Physiol Anthropol

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The aim of this study was to determine the effects of the single intake of a high-energy and high-fat meal, of that of a moderate-energy and high-carbohydrate meal, and of fasting, which are major global eating patterns involving the combination of various levels of energy and nutrients, on heart rate variability in healthy young males. Participants were assigned to three groups: the high-energy and high-fat meal group, the moderate-energy and high-carbohydrate meal group, and the fasting group (no meal) in a randomized crossover design. The R-R intervals were continuously recorded before and after meals. Physiological and psychological data were obtained before and 30, 60, 90, and 120 min after meal intake. The main results were: (1) decreased sympathetic modulation of the heart and increased parasympathetic modulation of the heart in the fasting group, indicated by an unchanged heart rate, a decreased lowfrequency/high-frequency ratio, and increased highfrequency power of heart rate variability in the fasting group; (2) cardiac sympathetic activation or parasympathetic withdrawal after the intake of either a high-energy and high-fat meal or a moderate-energy and high-carbohydrate meal, indicated by increases in the heart rate and the lowfrequency/high-frequency ratio of heart rate variability, and a decrease in the high-frequency power of heart rate variability in both the high-energy and high-fat meal group and the moderate-energy and high-carbohydrate meal group; and (3) the high-energy and high-fat meal group and the moderateenergy and high-carbohydrate meal group showed similar movement in physiological and psychological measurements after the meal intake. In conclusion, the intake of the highenergy and high-fat meal and the moderate-energy and highcarbohydrate meal similarly activated sympathetic modulation of the heart, whereas fasting suppressed sympathetic modulation of the heart compared with the other two eating groups in healthy young males.

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“…After a thorough explanation of the purpose and procedures of the study and informed consent obtained, experiments were initiated. Since it is known that age and/or food may effect HR variability (Hayano et al, 1990b;Lipsitz et al, 1990), younger subjects were selected and experiments were conducted at least 3 hours after their last meal. The illumination of the experimental room was an average of 1100 lux approximately on the table height level.…”

Section: Subjectsmentioning

confidence: 99%

Individual Differences in Physiological Responses and Type A Behavior Pattern.

Oishi

Kamimura²,

Nigorikawa

et al. 1999

Appl Human Sci

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Abstract.The relationships between individual differences in psychophysiological responses and tendency of Type A behavior pattern (TABP) were investigated during mental arithmetic (MA) at a steady rhythm, challenging calculation (Uchida-Kraepelin serial addition test: UK test), music listening, and exposure to an 80 dB SPL of white noise. Each mental task was sustained for 5 minutes. Sixteen healthy Japanese adults, (10 males and 6 females) with an age from 18 to 36 years old volunteered for this study. The KG's Daily Life Questionnaire (KG Questionnaire) was used to investigate the tendency toward TABP, which included three sub-factors: aggression-hostility, hard-driving and time urgency, and speed-power items. Recorded physiological variables were respiratory rate (RR), skin resistance response (SRR), eyeblinks, and heart rate (HR) calculated using frequency analysis to render high frequency power (HF) and the ratio of low/high frequencies (L/H ratio). During the MA and UK tests, significant increases in HR, L/H ratio, RR occurred, while significant decreases in HF were observed. Eyeblinks significantly increased during the MA test and significantly decreased during the UK test. During music and white noise, no significant changes occurred except for SRR, which decreased significantly. The coefficient of variances in each response was over 20% for almost all variables, indicating that individual differences in the magnitude of each response were large, even if the direction (increase or decrease) of the change was the same in almost all subjects. The highest correlation coefficients (r) between the mean values of relative magnitude for each variable and TABP scores during the MA and UK tests were obtained for the L/H ratio (MA: r=0.591, UK test: r=0.577) and the RR (MA: r= 0.576, UK test: r= 0.511). These values were statistically significant (p<0.05). Similar results were obtained for TABP sub-factors. Though other investigations have reported relationships between HF and TABP, we found no significant relationship. It was suggested that sympathetic nerve activity became greater for TABP individuals than for Type B individuals under stress conditions.

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Diurnal variations in vagal and sympathetic cardiac control

Cited by 89 publications

References 19 publications

The potent role of increased sympathetic tone in pathogenesis of essential hypertension with neurovascular compression

The potent role of increased sympathetic tone in pathogenesis of essential hypertension with neurovascular compression

Effects of Modern Eating Patterns on the Cardiac Autonomic Nervous System in Young Japanese Males

Individual Differences in Physiological Responses and Type A Behavior Pattern.

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