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"circadian rhythm", " sleep", "high blood pressure"

Yuri Kawabe, Yasuyuki Nakamura, Sayuri Kikuchi, Yoshitaka Murakami, Taichiro Tanaka, Toru Takebayashi, Akira Okayama, Katsuyuki Miura, Tomonori Okamura, Hirotsugu Ueshima
AIM: To examine the relationship between the type of work and the number of metabolic syndrome diagnostic components(MetS-DC), as well as the risk of MetS, with adjustment for lifestyle habits in Japanese workers. METHODS: We examined the baseline data from 4,427 participants(81.4% male) aged 19 to 69 years old. The physical activity of each participant was classified according to the International Physical Activity Questionnaire(IPAQ). We defined the four MetS-DC in this study as follows: 1) high blood pressure(BP): systolic BP ≥130 mmHg, or diastolic BP ≥85 mmHg, or the use of antihypertensive drugs; 2) dyslipidemia: high-density lipoprotein-cholesterol concentration <40 mg/dl or triglyceride concentration ≥150 mg/dl, or on medication for dyslipidemia; 3) dysglycemia: fasting blood sugar level ≥110 mg/dl, or if less than eight hours after meals ≥140mg/dl, or on medication for diabetes mellitus; 4) overweight: a body mass index ≥25kg/m(2)...
2014: Journal of Atherosclerosis and Thrombosis
C Lovati, D D'Amico, M Zardoni, L Giani, E Raimondi, C Mariotti, L Scandiani, G Bussone, C Mariani
Following an allostatic perspective, episodic migraine (M) may be considered as an adaptive behavioural response to endogenous or exogenous stressors, while its progression to a daily or nearly daily form (chronic migraine) may represent the failure of adaptive strategies. Multiple factors may enhance the progression/chronification of M, and among these the presence of cutaneous allodynia (CA) as well as alterations in blood pressure and in sleep. The working hypothesis of the study was that subjects with M, and particularly those with CA, could show a tendency towards high blood pressure levels and/or to alterations in the circadian rhythm of blood pressure...
May 2012: Neurological Sciences
Lin-Bo Fan, James A Blumenthal, Alan L Hinderliter, Andrew Sherwood
OBJECTIVES: Blunted nighttime blood pressure dipping is an established cardiovascular risk factor. This study examined the effect of job strain on nighttime blood pressure dipping among men and women with high blood pressure. METHODS: The sample consisted of 122 blue- and white collar workers (men=72, women=50). The Job Content Questionnaire was used to measure job psychological demands, job control, and social support. The ratio of job demands to job control was used to assess job strain...
January 2013: Scandinavian Journal of Work, Environment & Health
W Fan, M Downes, A Atkins, R Yu, R M Evans
Obesity, and in particular central adiposity, is a key feature of metabolic syndrome, which includes trends toward increased triglycerides, insulin resistance, high blood pressure, hypercholesterolemia, and heart disease. It has a prevalence of 25% or more and is a dominant component of the health care budgets in Western societies. In addition to genetic causes, high-fat diets and disrupted sleep patterns have major influences on the development of metabolic syndrome. Recent studies have demonstrated active roles for the nuclear receptor superfamily and the energy-sensing kinase adenosine monophosphate (AMP)-activated protein kinase (AMPK) in regulating metabolism and circadian rhythm...
2011: Cold Spring Harbor Symposia on Quantitative Biology
Peter C Gay
Clinicians are becoming more aware of the risks of sleep deprivation and unrecognized sleep-disordered breathing in hospitalized patients, most importantly in those patients planning to undergo surgical procedures. Polysomnography is difficult to perform in the hospital setting, such that actigraphy or urinary metabolites of melatonin are often used as surrogate measures, and show that sleep is markedly impaired. Patients in the medical intensive care unit with sepsis or requiring mechanical ventilation may show complete absence of the normal circadian rhythm pattern, and many centers have initiated sleep-enhancement protocols...
September 2010: Respiratory Care
Antonio Culebras
Sleep affects brain function and may contribute to vascular cerebral pathology through a diversity of direct and indirect mechanisms. Circadian rhythm investigation shows increased incidence of stroke between 6 AM and 12 noon. Risk factors for stroke such as high blood pressure, ischemic heart disease, and diabetes are modified by sleep and sleep apnea. Epidemiological studies have shown a dose-response relationship between the severity of sleep apnea and the odds ratio for development of systemic hypertension...
September 2009: Seminars in Neurology
Cláudia Maria Salgado, Paulo César Brandão Veiga Jardim, Flávio Bittencourt Gonçalves Teles, Mariana Cabral Nunes
BACKGROUND: Low birth weight (LBW) is associated with increased incidence of high blood pressure (BP) and cardiovascular diseases in adulthood. OBJECTIVE: To evaluate possible changes in Ambulatory Blood Pressure Monitoring (ABPM) in LBW children. METHODS: The birth weight (BW) of 1049 school children (ages 8 to 11) living in Goiânia was assessed. Children with low birth weight (BW <or= 2.5 Kg) were compared with those of normal birth weight (BW >or= 3...
February 2009: Arquivos Brasileiros de Cardiologia
Aynur Okcay, Virend K Somers, Sean M Caples
There has long been a recognized link between obstructive sleep apnea (OSA) and the cardiovascular system, no aspect of which has been more studied than blood pressure. Research in OSA has not only demonstrated dysregulation of homeostatic cardiovascular mechanisms but also has furthered our understanding of blood pressure regulatory control. Acute nocturnal blood pressure elevations associated with disordered breathing events have been reproduced from a number of observational studies, the accrual of which has also made an increasing argument for the importance of OSA in the pathogenesis of diurnal hypertension, as suggested by the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC 7), which implicated OSA as a secondary cause of hypertension...
July 2008: Journal of Clinical Hypertension
K Yamasue, T Hayashi, K Ohshige, O Tochikubo, T Souma
Recent reports suggest that high blood pressure (BP) during the night is associated with hypertensive organ damage, and that increased BP in the morning is closely related to the incidence of stroke and ischemic heart disease. The aim of this study was to investigate the relationships between overnight urinary indicators and 24-hour (24-h) BP, especially in the morning and during sleep in the elderly. A total of 85 volunteers (males 43, females 42), aged between 51 and 76 years and not taking any antihypertensive medications, participated in this study...
January 2008: Clinical and Experimental Hypertension: CHE
Faye Routledge, Judith McFetridge-Durdle
BACKGROUND: Researchers have discovered that blood pressure (BP) varies in a diurnal manner throughout a 24-hour period, being higher during the day and lower at night. Most people have a dipping BP pattern characterized by a nighttime BP that is 10-20% lower than their daytime BP. Individuals who experience a less than 10% reduction in nighttime BP are described as having a nondipping BP pattern. Although controversial, there is a growing body of evidence suggesting that a nondipping BP pattern is associated with a greater risk of target organ damage among individuals with essential hypertension...
March 2007: European Journal of Cardiovascular Nursing
Takeshi Tanigawa, Isao Muraki, Mitsumasa Umesawa, Naoko Tachibana, Hiroyuki Noda, Masaya Takahashi, Keiko Mutou, Yoshiko Kage, Lawrence Smith, Hiroyasu Iso
BACKGROUND: Sleep-disordered breathing (SDB) can be one of the major determinants of high blood pressure (BP), but there has been no study on SDB with an emphasis on shift workers. The objective of this study was to examine whether a relationship between SDB and blood pressure/hypertension is more evident among shift workers than among day workers. METHODS: In this cross-sectional study, we measured BP levels and oxygen desaturation index (by nocturnal pulse oximetry) among 253 male shift workers and 206 male day workers aged 30 to 62 years at nuclear power plants in Japan...
April 2006: American Journal of Hypertension
Kazuo Eguchi, Kazuomi Kario, Satoshi Hoshide, Joji Ishikawa, Masato Morinari, Kazuyuki Shimada
BACKGROUND: Sleep-disordered breathing (SDB) is recognized as a risk factor for cerebrovascular disease. The objective of this study was to investigate the relationship between nocturnal hypoxia and silent cerebral infarct (SCI) in the general population. METHODS: In the 2001 annual health check in Nishiarita, Japan, 170 individuals at high risk were screened who met more than three of the following criteria: high blood pressure, hypercholesterolemia, left ventricular hypertrophy by electrocardiography, hemoglobinA(1)c >6...
November 2005: American Journal of Hypertension
Osamu Tochikubo, Kiyoko Nishijima
We have previously reported that a high sodium intake increases sleep-time blood pressure (BP) in young men. However, there are cases in which this relation does not apply. To account for them, we investigated the relation between sodium intake and cardiac sympatho-vagal balance (SVB) in young men with high BP. Sodium intake was estimated from the amount of urinary sodium excretion over 1 week. Twenty-four-hour (24-h) urinary sodium excretion (Salt24), 24-h ambulatory BP and ECG were obtained on the last day of the observation period...
June 2004: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Michael G Ziegler
PURPOSE OF REVIEW: The failure to lower systolic blood pressure at night (called non-dipping) and sleep apnea are both associated with adverse cardiovascular outcomes. Sleep apnea is a common cause of non-dipping blood pressure. RECENT FINDINGS: Sleep apnea increases night time blood pressure through enhanced cardiac pre-load, sleep disturbance and hypoxia. Hypoxia elicits increased levels of norepinephrine, endothelin and erythropoetin. Patients with sleep apnea tend to be elderly and obese, so they have poor endothelial nitric oxide release and blunted baroreflexes...
January 2003: Current Opinion in Nephrology and Hypertension
J Polónia
No abstract text is available yet for this article.
October 2000: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
L H Pelttari, E K Hietanen, T T Salo, M J Kataja, I M Kantola
The antihypertensive effects of four different antihypertensive medications (beta-blocking agent, atenolol 50 mg; calcium-antagonist, isradipine SRO [slow release] 2.5 mg; diuretic, hydrochlorothiazide [HCTZ] 25 mg; and angiotension converting enzyme-inhibitor, spirapril 6 mg) on obese patients with sleep disordered breathing and hypertension were compared by the ambulatory blood pressure measurement (ABPM). Eighteen patients were randomized in a double-blind, crossover fashion to receive each of the four different medications for 8 weeks...
March 1998: American Journal of Hypertension
T A Sulbarán, E Silva Rondón
UNLABELLED: To establish the normal values for Ambulatory Blood Pressure Monitoring (ABPM) in normotensive, non-obese, male adolescents without family history of High Blood Pressure (HBP), a 24 hours ABPM study using oscillometric method (Space Lab 90207) was preformed on 102 subjects, 10-18 years of age, classified in 3 age groups: Group 1: 10-12, group 2: 13-15 and group 3: 16-18. RESULTS: Systolic and Diastolic Blood Pressure (SBP, DBP) mean values (+/- standard deviation), during 24 hours were: 109/64 (7...
November 1997: Investigación Clínica
R R Townsend, V Ford
The number of patients undergoing ambulatory blood pressure monitoring (ABPM) and the number of publications using this technique to evaluate the risks and effects of high blood pressure on target organs has been increasing, and dramatically so, in the last 5 years. Much of this growth has centered on the role of the blood pressure load (the percentage of systolic or diastolic readings above a preset value during a specific time period) and the changes in blood pressures levels that occur, with sleep. Although many studies are focused on the interaction between blood pressure (as assessed by ABPM) and the heart, interest is growing in the application of ABPM to the practice of nephrology...
November 1996: Journal of the American Society of Nephrology: JASN
P Baumgart, P Walger, K G Dorst, M von Eiff, K H Rahn, H Vetter
Circadian blood pressure rhythms were examined in subjects exhibiting various forms of secondary and essential hypertension and in normotensive subjects with and without renal disease. Indirect ambulatory blood pressure recordings were performed in 284 subjects for 24 h. In contrast to patients with essential hypertension and to normotensive healthy subjects, the circadian fluctuations of blood pressure were reduced in secondary hypertensives and in normotensive renal patients. In renal hypertensives, these alterations in the diurnal blood pressure variations were dependent on the degree of renal failure...
May 1989: Journal of Hypertension. Supplement: Official Journal of the International Society of Hypertension
L J Lin, Y Z Tseng, F T Chiang, W P Tseng
Noninvasive ambulatory blood pressure monitoring (NABPM) has been playing an increasing role in the diagnosis of hypertension and in the evaluation of antihypertensive drugs. NABPM data for the normal Chinese population has not yet been established. However, data obtained from 25 young male Chinese adults has been analysed. Average ambulatory blood pressure was 120 +/- 8/74 +/- 7 mmHg for the whole-day monitoring. There was an evident diurnal change of blood pressure during the 24-hour monitoring period with higher blood pressure levels being recorded during the daytime, rather than during the nighttime (7...
February 1990: Journal of the Formosan Medical Association, Taiwan Yi Zhi
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