Search Results
Results 201 - 250 of 883
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Raven Peter B - - 2006
Within the past 20 years numerous animal and human experiments have provided supportive evidence of arterial baroreflex resetting during exercise. In addition, it has been demonstrated that both the feedforward mechanism of central command and the feedback mechanism associated with skeletal muscle afferents (the exercise pressor reflex) play both independent ...
Leow M K - - 2005
The perilous potential of metoclopramide when used inadvertently in patients harbouring phaeochromocytomas goes largely under-recognised. Despite the rarity of phaeochromocytoma, clinicians should exercise caution in the use of metoclopramide among hypertensives and those with labile blood pressures, given the potentially life-threatening crisis it can readily evoke in those with this ...
Rdzanek Adam - - 2006
BACKGROUND: Hypertension is diagnosed in approximately 50% of patients with acute myocardial infarction. Urotensin II (U-II) - a potent vasoactive peptide shown to be elevated in hypertensive subjects, can contribute to negative myocardial remodelling and development of left ventricular failure. Data concerning U-II activity under exercise conditions and its influence ...
Miyai Nobuyuki - - 2005
BACKGROUND: It is claimed that exaggerated blood pressure (BP) reactivity to behavioral stress may play a role in hypertension. This study aimed to clarify whether exaggerated BP reactivity during physical exercise is associated with any other abnormalities in ambulatory BP, autonomic nervous control, and target organ damage among middle-aged normotensive ...
Cohen Philip R - - 2005
Methotrexate-related hematologic toxicity may include leukopenia, thrombocytopenia, megaloblastic anemia, and pancytopenia. We report a woman with hypertensive renal disease who was receiving hemodialysis and developed pancytopenia following a single intradermal infiltration of 25 mg of methotrexate. Caution should be exercised when considering the use of either systemic or intralesional methotrexate ...
Payne R A - - 2006
The arterial pulse-wave transit time can be measured between the ECG R-wave and the finger pulse (rPTT), and has been shown previously to have a linear correlation with blood pressure (BP). We hypothesized that the relationship between rPTT, preejection period (PEP; the R-wave/mechanical cardiac delay), and BP would vary with ...
Pescatello Linda S - - 2005
Despite the pervasiveness of hypertension (HTN), the exercise dose needed to lower blood pressure (BP) remains to be quantified. The purpose of this manuscript is to discuss recent advances in exercise prescription (ExR x) for HTN. The take-home message in ExR x for those with HTN is that the antihypertensive ...
Park S - - 2005
Time of day (TOD) for exercise may influence blood pressure (BP) reduction in hypertension because of the diurnal variation of BP and the duration of BP reduction following a single bout of exercise. The purpose of this study was to observe the effects of TOD for exercise on ambulatory blood ...
Hamer Mark - - 2006
The beneficial impact of regular exercise on cardiovascular health is partly mediated by psychobiological mechanisms. However, the effect of acute exercise on psychobiological responses is unclear. Thus, we performed a systematic review of randomised controlled trials (RCTs) that examined the effect of acute aerobic exercise on blood pressure (BP) responses ...
Momen Afsana - - 2005
Static exercise causes activation of the sympathetic nervous system, which results in increased blood pressure (BP) and renal vascular resistance (RVR). The question arises as to whether renal vasoconstriction that occurs during static exercise is due to sympathetic activation and/or related to a pressure-dependent renal autoregulatory mechanism. To address this ...
Fang Jing - - 2005
BACKGROUND: A favorable effect of exercise on cardiovascular longevity has been repeatedly demonstrated in the general population. The association of exercise and cardiovascular disease (CVD) outcome among persons with different blood pressure (BP) status is less well known. METHODS: We examined the epidemiologic follow-up of the First National Health and ...
Baster Tom - - 2005
BACKGROUND: Exercise is advocated for the prevention, treatment and control of hypertension. However, the treatment effect of exercise on hypertension is difficult to determine as many studies are poorly controlled and involve small sample sizes. OBJECTIVE: This article reviews current knowledge about exercise and blood pressure (BP), and provides a ...
Diwan S K - - 2005
BACKGROUND: Longitudinal studies have revealed significant correlation between exaggerated blood pressure response to exercise and higher incidence of developing resting hypertension in future. Normotensive persons at high risk of developing systemic hypertension have greater cardiovascular reactivity to exercise. METHODS AND RESULTS: Our study compared the blood pressure response to treadmill ...
Stewart Kerry J - - 2005
BACKGROUND: Because of age-related differences in the cause of hypertension, it is uncertain whether current exercise guidelines for reducing blood pressure (BP) are applicable to older persons. Few exercise studies in older persons have evaluated BP changes in relation to changes in body composition or fitness. METHODS: This was a ...
Moriguchi Jiro - - 2005
Although exercise is recommended for the primary prevention of hypertension, and although it is generally known to have a beneficial effect on endothelial function, working individuals often find it difficult to maintain a consistent exercise regimen. In the present study, therefore, we examined the effects of infrequently performed exercise on ...
Lénárd Zsuzsanna - - 2005
In young normotensive subjects, parental hypertension is associated with stiffening of the carotid artery and reduction in cardiovagal outflow and baroreflex gain. In subjects without parental hypertension regular exercise training was found to attenuate age-related reduction in carotid compliance and baroreflex gain. The aim of the present study was to ...
Harvey Paula J - - 2005
OBJECTIVES: To determine, in sedentary normotensive postmenopausal women, the after-effects of exercise on systemic and regional hemodynamics, and whether changes in total peripheral conductance after exercise relate to changes in brachial artery flow-mediated vasodilation (FMD). METHODS: In 13 sedentary postmenopausal women, the blood pressure (BP), cardiac output, total peripheral resistance ...
Kuru Oktay - - 2005
Nitric oxide (NO) is involved in regulation of vascular tone and renal hemodynamics. Inhibition of NO synthase (NOS) by Nomega-nitro-L-arginine methyl ester (L-NAME) promotes systemic hypertension and glomerular damage. Exercise is effective in reducing elevated blood pressure in hypertensive individuals and rats treated with L-NAME. We investigated the effects of ...
Bond Vernon - - 2005
A hyperreactive blood pressure response to exercise is a predictor of developing hypertension. The present study determined the influence of physical activity on an exaggerated exercise blood pressure response (EEBPR) in normotensive African-American women. We screened 36 women 18-26 years of age for EEBPR defined as a > or = ...
Teng X X Joint Research Center for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N. T., Hong - - 2005
This study examines the recoverability trend of blood pressure (BP) and pulse transit time (PTT) during the 60 minutes immediately following a treadmill exercise. Experiments were conducted on 12 healthy and normotensive subjects, including 8 males and 4 females. All subjects were directed to run on a treadmill at 10 ...
Yamakoshi T T Faculty of Engineering, Fukui University, Fukui, - - 2005
Lowering of what we term a driver's Activation State (AS) during monotonous driving conditions may increase the risk of an accident. To develop an in-car environment that allows active driving - "Biofee dforward System" - we have investigated the effects of applying a stimulus of increased inspired oxygen fraction (F<inf>I</inf>O<inf>2</inf>) ...
Wong Y Y Joint Research Centre for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong - - 2005
Pulse transit time (PTT) is one of the physiological parameters that can be utilized to estimate arterial blood pressure (BP) non-invasively. However, the effects of successive exercises on the relationship between PTT and BP have not yet been studied systematically. This study examines the variation in PTT and BP on ...
Ogoh Shigehiko - - 2005
Exercise challenges cerebral autoregulation (CA) by a large increase in pulse pressure (PP) that may make systolic pressure exceed what is normally considered the upper range of CA. This study examined the relationship between systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean arterial pressure (MAP) and systolic (V(s)), ...
Izdebska E - - 2004
The objective of our study was to compare the cardiovascular effects of moderate exercise training in healthy young (NTS, n=18, 22.9+/-0.44 years) and in hypertensive human subjects (HTS, n=30, 23+/-1.1). The VO(2max) did not significantly differ between groups. HTS of systolic blood pressure (SBP) 148+/-3.6 mmHg and diastolic blood pressure(DBP) ...
Doumas Michael N - - 2004
The aim of this study was to investigate: 1) the effects of treadmill exercise on plasma catecholamines and endothelin-1 (ET-1, a potent vasoconstrictor) levels in hypertensive patients; and 2) the impact of 1-month therapy with losartan as compared with moxonidine on catecholamine and ET-1 changes during exercise. Twenty-eight patients with ...
Nakashima M - - 2004
It has not been fully clarified whether exercise blood pressure (BP) in young adult men and women is useful to predict future BP, especially in Asian people. A long-term prospective study was conducted in graduates of a medical school in Japan; 138 men and 76 women whose mean age was ...
Nakas-Ićindić Emina - - 2004
Angiotensin converting enzyme (ACE) plays an important role in blood pressure regulation not only in the state of rest, but also during physical exercise. The aim of this study was to estimate the serum ACE activity in response to acute dynamic exercise. The study involved a group of young, healthy, ...
Pescatello Linda S - - 2004
OBJECTIVE: Blood pressure (BP) is immediately lowered after a session of dynamic exercise, e.g. postexercise hypotension (PEH). The optimal exercise intensity needed to evoke PEH has not been established. We examined the effect of light (LITE) and moderate (MOD) exercise intensity on PEH. DESIGN: Subjects were 49 men (mean +/- ...
Kato Masayoshi - - 2004
BACKGROUND: Endothelial production of nitric oxide (NO) is attenuated in patients with essential hypertension. We investigated whether treatment with amlodipine increased exhaled NO output (VNO) at rest and during exercise in patients with essential hypertension. METHODS: We studied the effect of amlodipine in seven untreated hypertensive patients. Cardiopulmonary exercise testing ...
Friedman Seth D - - 2004
BACKGROUND: Prior work reported elevated gray matter (GM) lactate and Glx (glutamate + glutamine + GABA) concentrations in unmedicated patients with bipolar disorder (BP) compared with healthy controls (HC). This study examined whether lithium (Li) and valproic acid (VPA) treatment modulated these chemicals. METHODS: A subset of previously reported BP ...
Anderson John E - - 2004
BACKGROUND: Exercise training improves blood pressure (BP) in the general population, but prior studies in hemodialysis (HD) patients only used pill counts or treatment-related BPs. We evaluated the effect of 3 to 6 months of intradialytic exercise training on ambulatory blood pressure (ABP) and treatment-related pre- and postdialysis BP. PATIENTS ...
Dayi Sennur Unal - - 2004
The aim of the present study was to investigate the adverse effects of hypertension on the cardiovascular system in daily activities and the effect of acute blood pressure reduction on oxygen (O(2)) uptake kinetics. Twenty hypertensive patients were included in the study group. Patients performed treadmill exercise tests (2.5 km/hour ...
Tryfon Stavros - - 2004
BACKGROUND: Several studies assessing the role of obstructive sleep apnea syndrome (OSAS) as an independent risk factor for hypertension have produced conflicting results. Although the sleep apnea syndrome is associated with hypertension, there are no references regarding the blood pressure response of normotensive OSAS patients during exercise. STUDY OBJECTIVES: The ...
Mellen Philip B - - 2004
To evaluate the prevalence of nutrition and exercise counseling for patients with hypertension. Cross-sectional survey data from the National Ambulatory Medical Care Survey (NAMCS) and the National Hospital Ambulatory Medical Care Survey (NHAMCS) for 1999 and 2000. Office-based physician practices and hospital outpatient departments. Patients age 18 or older with ...
Martinez-Vea Alberto - - 2004
BACKGROUND: Increased left ventricular mass (LVM) and left ventricular hypertrophy have been found in early stages of autosomal dominant polycystic kidney disease (ADPKD). The mechanisms that lead to an increase in LVM in this population are unknown. The aim of this study is to evaluate blood pressure (BP) response to ...
Bond Vernon - - 2004
Genetic and environmental hypotheses may explain why normotensive persons at high risk of developing hypertension often exhibit greater cardiovascular reactivity to stressors than those at low risk. Pearson's correlation was used to evaluate reproducibility and independent t test to compare the cardiovascular responses to 30 W of exercise of normotensive ...
Chang Hyuk-Jae - - 2004
BACKGROUND: The diagnostic and prognostic importance of exaggerated blood pressure response to exercise is controversial. Endothelial dysfunction has been demonstrated in patients with atherosclerosis and risk factors for coronary artery disease, but there is a paucity of information on patients with exercise-induced hypertension. HYPOTHESIS: We designed the study to evaluate ...
Ormezzano O - - 2004
Decreased baroreflex sensitivity (BRS) is a prognostic marker in essential hypertension. Animal experiments suggest that decreased BRS is related to increased oxidative stress. Our study was aimed at testing whether oxidative stress, estimated by isoprostane 15-F(2t)-IsoP urinary levels, is correlated to BRS variation in healthy subjects as well as in ...
Nashar Khaled - - 2004
Patients with the metabolic syndrome have three or more of five cardiovascular risk factors and increased oxidative stress, arterial stiffness and pressor responses to exercise, which may contribute to their threefold greater risk for coronary heart disease. In addition to lowering basal blood pressure (BP), angiotensin receptor blockers (ARBs) may ...
Sokunbi, OG; Physiotherapy Department, ...
This study was designed to compare the effects of bicycle ergometry exercise and six-minute walk exercise on the heart rate, systolic and diastolic blood pressure in women with pregnancy induced hypertension (PIH). Thirty subjects (15 primigravidae + 15 mulitigravidae) in their third trimester participated in this study. Their age ranged ...
Hernelahti Miika - - 2004
Part of the association between physical activity and low blood pressure (BP) may be a consequence of genetic selection. We investigated the association of genetic factors and physical activity in adolescence and adulthood with BP. BP was measured with a Finapres device in 71 monozygotic and 104 dizygotic male twin ...
Rinder Morton R - - 2004
To compare the effects of exercise training and hydrochlorothiazide on left ventricular (LV) geometry and mass, blood pressure (BP), and hyperinsulinemia in older hypertensive adults, we studied 28 patients randomized either to a group (age 66.4 +/- 1.3 yr; n = 16) that exercised or to a group (age 65.3 ...
Meles Ester - - 2004
BACKGROUND: Device-guided breathing exercises at home have a potential to become a nonpharmacologic treatment of high blood pressure (BP). The aim of this study was to evaluate the impact of device-guided breathing exercises on both office and home BP. METHODS: A total of 79 mild hypertensive individuals, either medicated or ...
Higashi Yukihito - - 2004
Recent epidemiologic studies have shown that aerobic exercise, one of lifestyle modifications, reduces cardiovascular morbidity and mortality in the general population. However, the mechanisms underlying the anti-atherogenic and anti-hypertensive effects of exercise remain unclear. Hypertension is associated with alteration in endothelial function mediated through reduced nitric oxide (NO) bioavailability. Endothelial ...
Stewart Kerry J - - 2004
BACKGROUND: Persons with high normal blood pressure (BP) or mild hypertension who also have an exaggerated BP response to exercise are at risk for worsening hypertension. The mechanisms that explain this relationship are unknown. We examined the relationships of endothelial vasodilator function and of aortic stiffness with exercise BP. METHODS: ...
Pescatello Linda S - - 2004
Hypertension (HTN), one of the most common medical disorders, is associated with an increased incidence of all-cause and cardiovascular disease (CVD) mortality. Lifestyle modifications are advocated for the prevention, treatment, and control of HTN, with exercise being an integral component. Exercise programs that primarily involve endurance activities prevent the development ...
Yun Sung Ho - - 2004
Head-out water immersion (HOI) increases cardiac output (CO) for a given oxygen consumption. To investigate whether professional breath-hold divers show a similar response, cardiovascular responses to HOI were compared between six Korean women breath-hold divers, six non-diving housewives and six non-diving young women at rest and while performing leg cycle ...
Pierson Lee M - - 2004
OBJECTIVE: To examine the association between the graded exercise systolic blood pressure (SBP) response and left ventricular (LV) geometric structure in patients with untreated mild hypertension. PARTICIPANTS: The study included 80 sedentary, overweight patients (43 female and 37 male) with unmedicated high normal blood pressure or stage 1-2 hypertension. METHODS: ...
Zhang Xin-xia - - 2004
OBJECTIVE: To investigate the prognostic value of exercise combined with 24-hour ambulatory blood pressure monitoring (ABPM) in the elderly hypertensive patients. METHODS: Forty-five patients over 60 years old were asked to perform submaximal exercise with controlled symptoms according to modified Bruce protocol to detect exercise-induced hypertension, followed by ABPM. RESULTS: ...
Little William C - - 2004
Diastolic dysfunction may be exacerbated by increased systolic blood pressure (SBP) during exercise. Ang II may contribute to this process. We performed a randomized, double-blind, crossover study of two weeks of candesartan (16 mg) and verapamil (SR 160 mg). The 21 subjects were 64 +/- 10 years old with ejection ...
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