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Nag S S Department of Pathology (Neuropathology), Queen's University, Kingston, Ontario, - - 1990
The pattern of Evans blue extravasation in the brain in norepinephrine-induced acute hypertension is similar to our previous observations using horseradish peroxidase as a tracer. Pretreatment with flunarizine IV resulted in significant reduction of RISA leakage in all regions of the brains of acutely hypertensive rats. The reduction in RISA ...
Maheswaran R - - 1989
There is a known association between hypertension and hyperparathyroidism but the mechanism remains unclear. A total of 115 patients with hyperparathyrodism were examined in a retrospective study, and 54.8% were hypertensive. Serum urea and creatinine levels were higher in the hypertensive patients compared with the normotensive patients. Parathyroidectomy had little ...
Montgomery B S - - 1989
Several series have suggested that the incidence of hypertension following extracorporeal shockwave lithotripsy (ESWL) may be as high as 8%. In this study, changes in blood pressure and the incidence of hypertension have been observed in 733 patients 12 to 44 months after renal ESWL on the Dornier HM3. The ...
Mazzanti L - - 1989
To evaluate the possible functional relationships between hypertensive status and syncythiotrophoblast plasma membrane behaviour we have carried out a freeze-fracturing and biochemical investigation to assess: 1) ultrastructurally, relations between number and diameter of Intramembrane Particles (IMP) and hypertensive conditions; 2) biochemically, actin content of microvilli in this pathological status. Our ...
Watson D L - - 1989
The etiology of postpartum eclampsia and hypertension remains controversial. Recent reports have suggested a possible idiosyncratic hypertensive reaction associated with the use of bromocriptine mesylate. The purpose of this study was to determine whether bromocriptine, used for lactation suppression, is a risk factor for postpartum hypertension. In 1813 consecutively delivered ...
Falkner B - - 1989
The hypertensive adolescent requires a careful blood pressure evaluation. In most cases, extensive diagnostic studies will not be necessary, particularly if the patient exhibits characteristics of early essential hypertension. On the other hand, further evaluation should not be withheld in the absence of risk factors or the presence of significant ...
Khananashvili M M - - 1989
It is shown that stable arterial hypertension can be formed in dogs by the development of experimental pathology of higher nervous activity (behavior) as a result of prolonged brain work during exposure to a combination of three unfavorable factors: a large volume of information to be processed and assimilated, shortage ...
Sunano S - - 1989
Correlation between hypertension and impairment of endothelium-dependent relaxation was demonstrated using aortae from certain strains of rats with various levels of spontaneous hypertension. It was also observed that the impairment of endothelium-dependent relaxation is the secondary change due to hypertension, and the level and duration of hypertension is the determinant ...
Dardik B N - - 1989
Electrophoretic profiles of the molecular weight distributions of fibrinogen derivatives in blood provide a tool for combined assessment of coagulation and fibrinolysis in the course of vascular disease. Profiles obtained in studies on an experimental model of hypertension and in humans with occlusive vascular disease are discussed. In the experimental ...
Fouad-Tarazi F M - - 1989
Although hypertension has been defined numerically as blood pressure levels above 140/90 mmHg, there is no doubt that a blood pressure level within the "normal" range increases the stress on a diseased heart. For this reason, vasodilator therapy is often successful in treating congestive heart failure. The authors propose the ...
Chikanza I C - - 1989
Fifty two patients with severe hypertension were treated with parentral chlorpromazine and frusemide. There was a gradual reduction of blood pressure without reflex tachycardia in 92.4% of the cases. No serious side effects were observed. This therapeutic manoeuvre is simple, effective and a safe alternative for the management of hypertensive ...
Rambausek M - - 1989
Prevalence of hypertension and relation of hypertension to renal function, type of glomerulonephritis or histological features were evaluated in 311 patients with idiopathic chronic glomerulonephritis. The overall prevalence of hypertension was 49.8%. At least in women, prevalence of hypertension was increased even at serum creatinine levels less than 1.1 mg ...
Graham D I - - 1989
Circulation to the brain is greatly affected by hypertension and by its treatment. Neurologic dysfunction is prominent among the complications of increased arterial pressure and is also most susceptible to preventive antihypertensive therapy. The upward resetting of the limits of autoregulation of cerebral blood flow in hypertension is probably due ...
Barancik M - - 1989
Hypertensive crisis in a patient with pheochromocytoma can be induced by endoscopy premedication. Opiates, glucagon, and metoclopramide are commonly used in the gastrointestinal laboratory and capable of releasing catecholamines from a pheochromocytoma. Patients who have just had endoscopy can display untoward effects such as nausea, weakness, and diaphoresis. Such patients ...
Szilagyi J E - - 1989
Opiates are now known to be important modulators of cardiovascular function in both the normotensive and hypertensive states. There is accumulating evidence that endogenous opiates are elevated in models of hypertension of various etiologies including genetic and renovascular hypertension. Early evidence for elevated opiates in hypertension arose from observations that ...
- - 1989
The present guidelines were prepared by a subcommittee of the WHO/ISH (International Society of Hypertension) Mild Hypertension Liaison Committee, and wee finalized after discussion at the Fifth WHO/ISH Mild Hypertension Conference. They include the definition of mild hypertension, and describe blood pressure measurement, factors influencing the decision to begin treatment, ...
Singh R B - - 1989
Hypertension is a complex, heterogeneous disorder of which the exact etiology is unknown. The difficulty in ascribing an independent role to a single dietary constituent in blood pressure regulation may be due to interactions among nutrients which influence blood pressure. The effect of any one nutrient, particularly magnesium, on hypertension ...
Sommers-Flanagan J - - 1989
This paper reviews the recent evidence (1979 to 1986) from investigations of whether there is a link between psychosocial variables and elevations in blood pressure. Forty-eight empirical studies are summarized, discussed, and contrasted with reviews and methodological criticisms of past investigations. Strong support is found for an association between hypertension ...
Ikeme A C - - 1989
Developing countries vary considerably with respect to the behaviour of the blood pressure among its populations. In many countries hypertension is the commonest cardiovascular disorder; but communities also exist within many of these countries that do not manifest hypertension. Some of the characteristics of such communities include primitive social structures ...
Cumes-Rayner D P - - 1989
Preference not to disclose information was investigated as a likely explanation for low rates of report of concerns in hypertensives. The research was designed to explore alternative explanations that have been provided by others. Two studies investigated the effect of situational contexts which provided low or high social pressure to ...
Odutola T A - - 1988
Glomerular filtration rates, as assessed by creatinine clearances were studied in 35 mild hypertensive, 104 moderate hypertensive and 167 severe hypertensive patients. The ages ranged from 16 to 65 years and the duration of hypertension varied between 0.5 and five years. The cause of hypertension was presumed idiopathic in all ...
Shaper A G - - 1988
Blood pressure measurements in 7735 middle-aged men from general practices in 24 towns in England, Wales and Scotland provide information on the prevalence of hypertension and its management in Great Britain. Despite a substantial correlation (r = 0.70) between systolic and diastolic blood pressures, individuals can show considerable discrepancies between ...
McClellan W M - - 1988
Hypertensive patients frequently discontinue follow-up care. In a population-based survey of 4688 adults, we examined the impact of nonattendance on blood pressure control in aware hypertensives. Nonattendance was defined as a failure to visit a physician for hypertensive care within a six-month interval and was reported by 29% of 907 ...
- - 1988
Although experience is still limited and more research is needed, the World Hypertension League recommends self-measurement of blood pressure in selected patients as an additional source of information to the practising physician, and as a way of encouraging patients to participate more actively in the therapeutic regimen.
Wallenfang T - - 1988
This is an investigation into the prognostic factors of 117 patients with spontaneous normo- and hypertensive intracerebral haematomas, supported by animal experiments. Preserved tissue elastance and fluid conduction enables the drainage of intrinsic haematoma serum into the CSF spaces in normotensive patients, who showed an increased extension of a perifocal ...
Mao Y - - 1988
A case-control study of hypertension was conducted, using as a sampling frame a cross-sectional survey of Canadian Federal civil servants. Three case groups were selected, based on prior knowledge of hypertensive status and measured blood pressure. A 3-to-1 matching scheme was employed. Data was analysed using a logistic regression model. ...
Stavig G R - - 1988
The prevalence of controlled and uncontrolled hypertension in the United States is lower for persons ethnically classified as Asian, particularly Japanese and excepting Filipinos, than for the general population. In this study, measurements of blood pressure were taken of 8,353 adults living in California, including 1,757 Asians and Pacific Islanders, ...
Melby Christopher L - - 1988
Abstract High blood pressure is a major public health problem in the United States. However, the underlying reasons for the chronic elevation of blood pressure (BP) are unknown in most cases of hypertension (HT), and medical care has focused on lowering already elevated BP, primarily by pharmacologic means. Although an ...
Abe H - - 1987
We have compared hypertensive target organ damage with home blood pressure readings (HBPs) and with office blood pressure readings (OBPs) in 100 patients with mild to moderate essential hypertension. The correlation between blood pressure levels and hypertensive target organ damage in HBPs and OBPs were similar (r = .42, p ...
Kottke T E - - 1987
Increases in disability and work loss have been noted following hypertension identification and treatment. To determine if iatrogenic disability is a necessary side-effect of successful treatment, self-reports of days lost from work and days spent in bed because of illness in the year before interview were compared in 1972 and ...
Giddens W E WE - - 1987
Arteriolar nephrosclerosis was observed at necropsy in 26 of 38 woolly monkeys (Lagothrix lagotricha). This lesion is the earliest histologic change associated with hypertension in humans. Seventeen of the monkeys had died of congestive heart failure, renal failure or acute cardiovascular accident, complications similar to those seen in human hypertension. ...
Cubberley R B - - 1987
Six black hypertensive patients responded favorably to treatment with verapamil hydrochloride (Isoptin). The patients were participants in a larger study.
Szilagyi J E - - 1987
The anteroventral part of the hypothalamus adjacent to the third ventricle (AV3V) has been implicated in electrolytic lesion studies as a site crucial to the development and maintenance of hypertension. Cryoblockade is known to alter synaptic and axonal transmission differently at different temperatures. In this study, cooling of the hypothalamus, ...
Kornel L - - 1987
Alterations in electrolyte transport across cell membrane of vascular smooth muscle (VSM) and changes in hemodynamics [increased extracellular fluid volume (ECFV) and cardiac output (C.O.)] have been implicated in the pathogenetic mechanisms of both mineralocorticoid-induced hypertension (MH) and essential hypertension (EH). We have previously found that mineralocorticoids (MC) can act ...
Birkett N J - - 1987
In community surveys of hypertension control the diagnosis is often based on blood pressure measurements taken on only one visit. The clinical diagnosis of hypertension requires demonstration of sustained blood pressure elevation. We conducted a survey that contrasted the results of these two approaches to determining the prevalence of hypertension ...
Borhani N O - - 1987
Left ventricular hypertrophy (LVH) is a major complication of hypertension. It is a major risk factor for mortality, including sudden death. Although LVH is not always directly related to the level of blood pressure (BP), it occurs early in the course of hypertension. In the early stages of hypertension, LVH ...
Marcovici O A - - 1987
We examined hypertension control during the Israel doctors' strike in a defined insured population of known hypertensives enrolled in a nurse-based hypertension control program. The strike was associated with a measurable increase in the prevalence of uncontrolled hypertension which was limited to males of relatively higher social class. No strike-related ...
Schoenfeld A - - 1987
A case of severe hypertension during labor after Naloxone injection is described in a patient with previous mild hypertension. The interaction of andogenous opioids and opiate antagonists, and their role in the control of blood pressure is discussed. Opiate antagonists should be given with caution to obstetric patients with mild ...
Eichberg J W - - 1987
During routine physical examination under ketamine sedation, 140 blood pressure measurements from male and 170 from female chimpanzees were derived over a period of 3 yr. Statistical analysis revealed generally no differences between the sexes but significant increases of both systolic and diastolic blood pressure with increasing age. The data ...
Feusner J - - 1987
Hypertension is a well-known finding in some patients with neuroblastoma. However, it has not previously been described in association with the use of Imipramine. We report the occurrence of severe hypertension (blood pressure 190/160) in a 4-year-old girl with neuroblastoma who was given Imipramine to control a behavior disorder. It ...
Heidbreder E - - 1987
In 205 patients with histologically evaluated glomerulonephritis, 69 patients with essential hypertension and 12 patients with renovascular hypertension, the retina was examined and evaluated by fundus photography. Changes of the retina were classified according to the recommendations of WHO: mild to severe changes of retinal arteries were termed as mild ...
Rauch A L - - 1986
To examine the role of an ouabain-like factor (OLF) in the pathogenesis of cardiovascular disease in hypertension, we examined plasma levels of OLF in a malignant form of one-kidney, one wrap (1K,1W) hypertension. Two weeks after the induction of hypertension plasma OLF increased to 282% compared to control animals. Additionally, ...
Körber N - - 1986
To study the impact of hypertension on conjunctival circulation, one group of healthy individuals and three groups of hypertensive patients (different stages of disease) were examined. Each participant had to undergo videomicroscopy to determine erythrocyte velocity in conjunctival capillaries, reactive hyperaemia and the diameter of the erythrocyte column within the ...
Birkett N J - - 1986
We evaluated the prevalence and control of hypertension in two Canadian cities without university medical centre facilities. A stratified multistage probability sample was selected, and we interviewed 6258 adults between the ages of 30 and 69 inclusive. Blood pressure measurements were obtained during home interviews. Up to two further visits ...
Moneta E - - 1986
Kallikrein and kininase activities were determined in urine of 58 hospitalized pregnant patients: 15 with E.P.H. gestosis, 10 with chronic hypertension, 18 with non proteinuric pregnancy induced hypertension, 15 with no hemodynamic disease as controls. All our cases with hypertension were treated with alpha-methyl-dopa. A significant increase in urinary kininase ...
Furspan P B - - 1986
A major focus of past and recent research in hypertension has been on the characterization of the nature of the vasculature changes which lead to the observed increase in total peripheral resistance responsible for the elevation of arterial pressure. Here we survey recent evidence which suggests that altered handling of ...
Ambrosio G B - - 1986
Two sets of data, derived from the WHO Cooperative Hypertension Community Control Project and concerned with spontaneous changes of blood pressure over a period of five years, are described. The first deals with the community as a whole, studied through the examination of two independent random samples of the same ...
Johansson H - - 1986
A hypertensive crisis with an arterial blood pressure of 280/180 mmHg developed immediately after an apparently successful removal of a phaeochromocytoma. The blood pressure could not be lowered by phentolamine and not until the administration of dihydralazine and furosemide was the systemic pressure normalized. In addition to residual high concentrations ...
Nissinen A - - 1986
The hypertension programme of the North Karelia Project aimed at lowering the high blood pressure level among the whole population. The influence of socioeconomic factors on the effect of reorganized hypertension care was analyzed among a cohort of 222 hypertensive patients during the five year follow-up. The fall in mean ...
Broulik P D - - 1985
Studies were performed in 86 patients with proven primary hyperparathyroidism pre-operatively and 6-7 months after parathyroidectomy. The 29% incidence of hypertension between patients with primary hyperparathyroidism is higher as compared with the incidence of hypertension in the general population. Systolic and diastolic blood pressures were significantly higher in patients with ...
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