Search Results
Results 401 - 450 of 883
< 4 5 6 7 8 9 10 11 12 13 14 >
Lo C Y - - 1998
We examined the effects of a 12-week exercise program on the exercise tolerance, blood biochemistry, blood pressure (BP) control, cardiac function, and quality-of-life (QOL) scores in 13 patients undergoing continuous ambulatory peritoneal dialysis (CAPD; six men, seven women; mean age, 46.5+/-12.8 years; mean duration on dialysis, 4.8+/-3.8 years). The patients ...
Seto S - - 1998
In resting condition, obese subjects are described as having impaired diastolic filling. To examine the effect of mild to moderate obesity on left ventricular diastolic performance during stress in hypertension, we determined the filling responses to dynamic submaximal exercise in 19 obese hypertensive patients (body mass index, 26 to 30 ...
Smith G D - - 1998
The haemodynamic and catecholamine responses to supine exercise, and the effect on standing blood pressure (BP), were studied in three groups with peripheral autonomic dysfunction; insulin-dependent diabetes mellitus (IDDM), familial amyloid polyneuropathy (FAP) and pure autonomic failure (PAF). Healthy normal subjects were studied as controls. With exercise, BP increased in ...
Paris D - - 1998
Abeta peptides are thought to be centrally involved in Alzheimer's disease (AD) pathogenesis, although Abeta's pathophysiological mechanisms remain to be elucidated. We previously showed that soluble beta-amyloid1-40 (Abeta) and Abeta1-42 exhibit vasoactive properties, and are able to promote vasoconstriction in rat aortae induced by an endogenous vasoconstrictor, endothelin-1. It is ...
Wagner C D - - 1998
The purpose of this study was to test the hypothesis that the correlation integral technique detects altered regulation of cardiovascular function during graded treadmill exercise. Arterial blood pressure (BP) was measured via telemetry before and during graded treadmill exercise in Sprague-Dawley rats. During treadmill running at mild, moderate, and heavy ...
Orbach P - - 1998
Hypertension is a very common vascular disease. It is seen in adolescents, obese persons, postmenopausal women, and the elderly. A nonpharmacologic approach to treatment is a critical first step in management. The modalities include a diet low in salt and saturated fat, exercise, less than 2 ounces of alcohol daily, ...
Smith G D - - 1998
Multiple system atrophy (MSA) is a progressive disorder in which autonomic features vary at different stages. Abnormal cardiovascular responses are common and it is now recognized that factors in daily life, such as exercise or food ingestion, can lower blood pressure (BP) substantially. The BP response to exercise differs in ...
Lewandowski J - - 1998
Some evidences indicate that the female sex hormones protect against the development of cardiovascular diseases. Modulation of sympathetic activity may be one of the possibilities. We investigated the influence of treadmill stress on blood pressure (BP) and plasma neuropeptide Y (NPY), norepinephrine (NE) and epinephrine (E) concentrations in 11 normotensive, ...
Frielingsdorf J - - 1998
BACKGROUND: Endothelial dysfunction of coronary arteries with impaired vasodilation has been reported in patients with arterial hypertension. However, the effect of dynamic exercise on coronary vasomotion of a stenotic vessel segment before and after PTCA has not yet been evaluated in these patients. METHODS AND RESULTS:Coronary vasomotion of a normal ...
Bassett D R DR - - 1998
Normotensive individuals who exhibit an exaggerated blood pressure (BP) response to exercise have an increased risk of future hypertension. However, previous studies failed to control for resting BP despite the fact that an elevated resting BP in the normotensive range is also a strong predictor of future hypertension. Therefore, we ...
Bar F - - 1998
AIMS/BACKGROUND: TIPS, an effective procedure applied for the treatment of complications of portal hypertension, is potentially followed by worsening of the hyperdynamic circulation of cirrhosis and the impairment of liver function. The aim of the present study was to evaluate short-term changes of functional liver plasma flow after application of ...
Petrella R J - - 1998
OBJECTIVE: Exercise is often recommended as therapy for hypertension, yet its use is not widespread among clinicians. Reasons include uncertainty regarding its efficacy, the relative importance of the exercise prescription determinants (intensity and frequency), or confounding variables including patient characteristics such as age and gender. This review will present the ...
Nho H - - 1998
The purpose of this study was to determine whether there are differences in the effects of exercise training between those with a parental history of hypertension and those without such a history. A group of 39 middle-aged hypertensive women were submitted to a 4-month exercise training programme. On the basis ...
Gadsbøll N - - 1998
The aims of this study were to examine (1) the cardiac response to exercise in essential hypertension and (2) the effect of long-term enalapril treatment on cardiac reserve. Ten normotensive control subjects and 15 patients with moderate, essential hypertension underwent radionuclide ventriculography during graded, supine exercise (0 W-50 W-100 W). ...
Oelsner D H - - 1998
BACKGROUND: Large volume paracentesis is a common treatment of ascites. Injury to abdominal wall collateral veins during this procedure can lead to hemoperitoneum. Because of this concern, the midline below the umbilicus is often recommended as a site for paracentesis because of its presumed avascularity. METHODS: We examined the subumbilical ...
Cottone S - - 1998
In vitro studies demonstrated a relationship between ET-1 and basic Fibroblast Growth Factor (bFGF), and of bFGF with Platelet Derived Growth Factor (PDGF). The present study was carried out to investigate in vivo the behaviour after vascular stress of circulating ET-1, bFGF and PDGF, and catecholamines, and their relationship. In ...
Selvamurthy W - - 1998
This study was conducted on 20 male patients of Essential Hypertension (EH) in order to explore the possible role of baroreflex mechanism in the etiology of EH and also to find out whether by restoration of baroreflex sensitivity to normal level either by postural tilt stimulus on a tilt table ...
Bove A A - - 1998
Hypertension is common, and even slight elevations in blood pressure can be associated with health risks. Regular aerobic exercise helps prevent hypertension. In patients who already have hypertension, such exercise has been shown to lower systolic and diastolic blood pressure by a mean of 10 mm Hg. For mild or ...
Tanaka H - - 1998
BACKGROUND: Although regular aerobic exercise has been shown to lower arterial blood pressure in older adult humans with essential hypertension, the mechanisms responsible for this hypotensive effect remain largely unknown. OBJECTIVE: To examine the hypothesis that the reduction in arterial blood pressure in older hypertensive humans with regular exercise is ...
MacRae H S - - 1998
PURPOSE: The purpose of this study was to validate the use of a motion tolerant blood pressure monitor (CardioDyne NBP 2000, Luxtec, Worcester, MA) ) against standard manual auscultation at rest and during exercise. METHODS: Nineteen subjects (men, N = 9; women, N = 10) participated in the study (mean: ...
West S G - - 1998
Regular physical exercise is known to reduce cardiovascular risk. We examined the effects of a single bout of moderate bicycle exercise on hemodynamic measures at rest and in response to the foot cold pressor (CP) and mental arithmetic (MA). Sedentary males and females (N = 32) were tested twice, following ...
Arida R M - - 1998
OBJECTIVES: The purpose of the present study was to compare the plasma and serum monoamine levels in sedentary, untrained normotensive and hypertensive men at rest with levels measured after an acute bout of exercise and to compare similar measurements following a 12-week aerobic training program. PLACE OF STUDY: The data ...
Lucini D - - 1997
OBJECTIVE: Excessive adrenergic responses have been reported in hypertensive patients treated with short-acting dihydropiridine calcium channel antagonists that might worsen cardiovascular risk. In this study we addressed whether lacidipine, a long-acting dihydropiridine, increases the sympathetic excitation produced by moderate dynamic exercise. DESIGN: Because of the wide changes in autonomic drive ...
Calzolari A - - 1997
OBJECTIVE: The purpose of the study was to evaluate the exercise tolerance and the behaviour of blood pressure during a maximal exercise testing on treadmill for a group of patients with renal transplant carried out at least 6 months earlier. EXPERIMENTAL DESIGN, SETTING AND PATIENTS: In a retrospective study, nineteen ...
Kristal-Boneh E - - 1997
BACKGROUND: Blood pressure (casual and daytime) is higher in winter than it is in summer, and this factor might be partly responsible for the higher cardiovascular mortality in winter. OBJECTIVE: To determine in a prospective study whether there is also a seasonal variation in exercise blood pressure. METHODS: We evaluated ...
Ketelhut R G - - 1997
Regular conditioning has been well documented to exert a beneficial effect on cardiovascular risk factors and to improve overall cardiovascular health and to reduce the incidence of coronary disease. There are conflicting results concerning the effect of physical exercise on blood pressure (BP) in hypertensive patients and its importance in ...
Rahman M A - - 1997
The objectives of this study were, first, to compare stroke volume to brachial artery pulse pressure ratios (SV/PP) as noninvasive, indirect estimates of total arterial compliance, in young subjects with primary hypertension or dilated cardiomyopathy and age-matched normal subjects and, second, to determine the influence of prior submaximal exercise on ...
Halbert J A - - 1997
OBJECTIVE: To identify the features of an optimal exercise programme in terms of type of exercise, intensity and frequency that would maximise the training induced decrease in blood pressure (BP). DATA IDENTIFICATION: Trials were identified by a systematic search of Medline, Embase and Science Citation Index (SCI), previous review articles ...
Katzarski K S - - 1997
The utility of measurement of the inferior vena cava diameter (IVCD) with ultrasound for the assessment of fluid status and posthemodialysis dry weight was studied in 35 hemodialysis (HD) patients, 17 with and 18 without hypertension. In 17 patients (group A), IVCD was measured before and 35 to 40 minutes ...
Silva G J - - 1997
We studied the effects of acute and chronic exercise on the arterial baroreflex and chemosensitive cardiopulmonary baroreflex (CCB) in spontaneously hypertensive rats (SHR). Arterial baroreflex and CCB were evaluated in normotensive rats (NR, n=11) and SHR (n=5) at rest and after 30 minutes of an acute bout of exercise (45 ...
Zanettini R - - 1997
The aim of this study was to assess the effects of aerobic exercise on resting and 24-hour blood pressure (BP), left ventricular mass (LVM), plasma fibrinogen and factor VII (FVII). For this purpose 14 sedentary subjects with untreated diastolic BP between 90 and 104 mm Hg completed a 12-week supervised ...
Mundal R - - 1997
It has been suggested that seasonal changes in cardiovascular risk factors may explain simultaneous seasonal variations in cardiovascular diseases. Since systolic blood pressure (SBP) during an ergometer exercise test adds prognostic information beyond that of BP at rest we aimed to study whether SBP during exercise also demonstrates similar seasonal ...
Kohno K - - 1997
To clarify characteristics of the patients in whom exercise training lowers blood pressure and to elucidate the mechanisms by which exercise training lowers blood pressure, we evaluated 24-h blood pressure, glomerular filtration rate (GFR), renal blood flow (RBF), filtration fraction (FF), plasma renin activity (PRA), plasma aldosterone concentration (PAC), plasma ...
Boyce M L - - 1997
The purpose of this study was to determine the effects of 4 months of exercise training (ET) on cardiorespiratory function and endurance, blood pressure, muscle strength, hematology, blood lipids, and renal function in individuals with chronic renal failure (CRF) who were not yet on dialysis. Sixteen subjects were recruited to ...
Clorius J H - - 1997
The exercise renogram is a rarely used diagnostic procedure, but it may visualize an exercise-induced change in renal function related to the pathophysiology of essential hypertension, which could greatly increase interest in this examination. The aim of this study was to demonstrate the interpretative approach and the terminology which is ...
Seals D R - - 1997
The efficacy of aerobic exercise for lowering arterial blood pressure (BP) in postmenopausal women with elevations of 130 to 159/85 to 99 mm Hg has not been established. To determine this, 10 postmenopausal women with high normal resting BP or stage I essential hypertension were studied throughout a 12-week lead-in ...
Buckworth J - - 1997
The effects of exercise detraining on resting finger arterial blood pressure (BP), the carotid-cardiac vagal baroreflex, and BP and heart rate (HR) responses to mental arithmetic and forehead cold exposure were studied in young (19 +/- 1.1 years) normotensive women with parental history of hypertension. Following 8 weeks of aerobic ...
Carry P Y - - 1997
OBJECTIVE: To assess the accuracy of respiratory inductive plethysmography (RIP) waveforms to those obtained with whole body plethysmograph (BP) as this device gives a plethysmographic signal and a pneumotachograph (PNT). DESIGN: Randomized controlled trial. SETTING: Physiologic laboratory in a university hospital. PARTICIPANTS: Eleven subjects from the laboratory staff. INTERVENTIONS: This ...
Saito M - - 1997
To investigate the effects of exercise duration on muscle sympathetic nerve activity (MSNA), heart rate, blood pressure (BP), tympanic temperature, blood lactate concentration, and thigh electromyogram were measured in eight volunteers during 30 min of cycling in the sitting position at an intensity of 40% of maximal oxygen uptake. MSNA ...
Gordon N F - - 1997
Although aerobic exercise training and diet-induced weight loss each have been shown to individually lower elevated blood pressure (BP), it is currently not known whether their combined use produces an additive antihypertensive effect. In this randomized clinical trial we therefore compared the effect on resting BP of exercise training only ...
Balogun M O - - 1997
Cardiovascular responses to maximal exercise testing with treadmill (TD) and bicycle ergometers (BE) were compared in 60 healthy male Nigerians aged 20-45 years. The duration of exercise (DOE), maximal heart rate (MHR), peak systolic blood pressure (PSBP), and peak rate pressure product (PRPP) values were higher with TD than BE ...
Duey W J - - 1997
OBJECTIVES: The objectives of the present study were (1) to evaluate the pressor response to an isometric handgrip exercise in normotensive black and white males; (2) to measure plasma catecholamine levels pre- and post-exercise, as an index of sympathetic nervous system activity; and (3) to quantify the pressor response to ...
Purzycki Z - - 1997
We investigated exercise induced urinary albumin excretion rate (UAE)(ex-UAE) in patients with borderline hypertension (BH) compared to normotensives with positive-PFH and negative-NFH family history of hypertension. The study population consisted of 20 young, non-obese males with BH defined according to WHO criteria and confirmed by 24 h ambulatory blood pressure ...
Papelier Y - - 1997
The arterial baroreflex opposes pressor responses to muscle ischemia (muscle chemoreflex). Our experiments sought to quantify the unknown effects of muscle chemoreflex on carotid sinus baroreflex (CSB) sensitivity. We generated CSB stimulus-response (S-R) curves by pulsatile application (triggered by each electrocardiogram R wave) of positive and negative neck pressure (from ...
Fish A F - - 1997
Stepping as an exercise modality has gained increasing popularity. The step treadmill is an exercise machine which simulates actual stair-climbing. The purpose of this study was to determine the effectiveness of a 16-week supervised aerobic step treadmill exercise training protocol in reducing resting blood pressure in women with unmedicated mild ...
Blum V - - 1997
The purpose of this study was to compare aortic blood pressure (AOR) to peripheral measurements by the Riva-Rocci/Korotkov (RRK) and Finapres continuous finger pressure (FIN) methods during dynamic and static exercise. A tip manometer was introduced in the ascending aorta after coronary angiography in 7 cardiac patients with good exercise ...
Manolas J - - 1997
This study was undertaken to determine the prevalence and distribution of diastolic function abnormalities at rest and during isometric exercise in patients with systemic hypertension using the recently introduced handgrip-apexcardiographic test (HAT). It has been shown that HAT reflects left ventricular pressure changes in early (relaxation) and late (compliance) diastole. ...
Nazar K - - 1997
Exaggerated blood pressure (BP) response to exercise in normotensive subjects is considered as a predictor of future hypertension. The aim of the study was to find out whether elevated BP response to exercise is associated with any other haemodynamic, metabolic or hormonal abnormalities. Abnormal BP response to exercise, i.e. systolic ...
Majahalme S - - 1997
There is considerable disagreement in the literature on the clinical usefulness of exercise testing as a tool for prediction of future hypertension. Much of the discrepancy between various reports is attributable to the difficulties of blood pressure (BP) measurement during exercise. Therefore, we investigated whether accurate intraarterial BP measurement will ...
Blanco M - - 1997
Ten hypertensive subjects were studied at the Vargas Medical School in Caracas, Venezuela. They were submitted to submaximal treadmill exercises according to Bruce's protocol under treatment with dopaminergic drugs (metoclopramide, bromocriptine). Before and during submaximal exercises, metoclopramide caused a hypotensive effect accompanied by an increased heart rate, which was blocked ...
< 4 5 6 7 8 9 10 11 12 13 14 >