Search Results
Results 451 - 500 of 657
< 5 6 7 8 9 10 11 12 13 14 >
Perneger T V - - 1993
OBJECTIVE: To establish nationwide projections for hypertension-related renal disease among middle-aged residents of the United States and compare disease burden in demographic subgroups. DESIGN: Integrated analysis of data from the US Census, the National Health and Nutrition Examination Survey of 1976 through 1980 (NHANES II), the 1971 through 1975 NHANES ...
Ojogwu L I - - 1993
Two hundred and ten patients who were normotensive during pregnancy and labour but developed hypertension during puerperium have been studied. Two groups were identified with this unexpected postpartum hypertension. Although the patients in group A who had earlier onset hypertension were younger and mainly nulliparas, there was no significant difference ...
Lewanczuk R Z - - 1993
Hypertension is frequently associated with primary hyperparathyroidism, yet the mechanism of such hypertension is unknown. Parathyroid hypertensive factor (PHF) is a circulating hypertensive factor found in a proportion of human essential hypertensive patients as well as in spontaneously hypertensive rats (SHR). In the latter case, PHF has been shown to ...
Goble M M - - 1993
Hypertension in infants is rare and requires a thorough evaluation. The incidence of hypertension in infancy has risen in recent years, reflecting both better monitoring methods and increasingly successful salvage of smaller and smaller newborns. Overall mortality and morbidity rates for uncontrolled hypertension in infants are unknown. With appropriate treatment, ...
Lowenthal M N - - 1993
Four patients with exudative retinopathy due to hypertension were observed for periods ranging from 12 to 35 months. Despite multiple drug therapy in high dosage and some clinic attendance, blood pressure was not controlled and remained severely elevated. Even though severe hypertension persisted, however, exudative phenomena disappeared and renal function ...
Rocchini A P - - 1993
Although cardiovascular disease is an uncommon cause of hypertension, the number one cardiovascular cause of hypertension, coarctation of the aorta, is easy to diagnose and treat. It is therefore mandatory that every individual who is evaluated for hypertension should have blood pressures measured in the arms and legs. The other, ...
Reid H L - - 1992
Changes in plasma fibrinogen concentrations (PFC) and relative plasma viscosity (RPV) were investigated in 61 Nigerian Africans while they were being treated for essential hypertension. The association of these hemorheologic variables with blood pressure was examined. An analogous study was done on 30 normotensive controls for comparison. The hypertensive patients ...
Pick W M WM Department of Community Health, University of Cape - - 1992
A study was conducted in Cape Town during 1990 to investigate the knowledge, attitudes and practices of 90 family practitioners with regard to hypertension and its management. Hypertension was regarded as an important health problem by 59% while 5% thought that it was not important. Sixty-eight per cent of family ...
Jain P - - 1992
This study evaluates the role of fluorescein angiography (FA) in detecting changes in the retinal and choroidal capillary bed in hypertension and defines its advantages over direct ophthalmoscopy. 37 patients with varying degree of severity of hypertension were studied. Direct ophthalmoscopy and FA was done in all cases. No significant ...
Veber B - - 1992
Severe hypertension with arterial spasm was observed after i.v. administration of prostaglandin E2 (PGE2) during uterine exploration under general anaesthesia for control of postpartum haemorrhage. This hypertension was exceptional because PGE2 is known to cause a decrease in systemic arterial pressure. Different hypotheses for this paradoxical hypertensive crisis after PGE2 ...
Schleiffer R - - 1992
Recent research provides evidence that parathyroid hormone is implicated in the pathogenesis of genetic hypertension. Abnormalities in calcium metabolism in genetic hypertension have been reported. These include hypercalciuria, depressed serum ionized calcium associated with enhanced serum parathyroid hormone levels. Calcium supplement resulted in normalization of calcium metabolism and reduction in ...
Wu J J - - 1992
A 40-year-old Chinese woman with systemic lupus erythematosus (SLE) developed labile blood pressure 3 years after her onset of high blood pressure. Pheochromocytoma was subsequently found and removed. Postoperatively her hypertension improved without change in her SLE activity. Our case demonstrates pheochromocytoma can be a cause of hypertension in SLE.
Lev E - - 1992
Neurocirculatory asthenia (NCA) is a fairly common functional disorder often encountered among military recruits. Symptoms in NCA tend to appear in waves, and are believed to disappear completely with the passage of time. Elevated arterial pressure is known to occur as part of the various haemodynamic manifestations of NCA. However, ...
Murphy M B - - 1992
A survey was carried out to determine whether physicians in Occupational Medicine exclude job applicants because of hypertension and to examine the critical blood pressure cut-off values they apply. The survey sampled 116 respondents, members of the American Occupational Medical Association, Central States. Of these, 33 (28%) reported excluding hypertensives ...
Pang S C - - 1992
The systemic vasculature is known to undergo marked change in both human and experimental hypertension. The in vitro study of individual cellular components from the blood vessel wall and the regulation of their intracellular biochemical processes will aid in developing an understanding of the pathogenesis of hypertension. Vascular smooth muscle ...
Clozel J P - - 1992
Anatomical changes of arteries and arterioles secondary to hypertension explain most of the late complications of this disease. Therefore, a series of experiments was performed to characterize the vascular protective effects of cilazapril in experimental hypertension. These experiments aimed to answer three types of questions: (a) In which vascular bed ...
Dzielak D J - - 1992
Primary or secondary activation of immune mechanisms has been implicated in the pathogenesis of many forms of hypertension. Changes in serum immunoglobulin levels, alterations in both humoral and cellular immune functions, and inherited abnormalities of the complement system have been identified in patients with essential hypertension. In addition, many models ...
De Plaen J L JL Department of Internal Medicine, Cliniques Universitaires St-Luc, Brussels, - - 1992
We report the case of a 42-year-old Zairian male who presented with paroxysmal attacks of hypertension accompanied by spontaneous recurrent hypothermia and profuse sweating of unknown origin. Routine and extensive examination failed to indicate a usual cause of arterial hypertension or for periodic hypothermia. Based on the hypothesis of an ...
Jamerson K - - 1991
Early intervention in the treatment of hypertension can reduce the detrimental effects of high blood pressure. Therefore it is important to be able to predict the development of hypertension in individuals. A number of factors can be used as predictors of hypertension, but only childhood high blood pressure (especially in ...
Brody M J - - 1991
A large body of evidence indicates that the central nervous system plays an essential role in the pathogenesis of hypertension. However, in many cases the specific brain regions involved and the mechanisms by which these regions promote hypertension are not known. In recent years, research in this and other laboratories ...
Weinberger M H - - 1991
Hypertension may result from a variety of abnormalities. The rise in blood pressure may trigger other secondary events that further influence cardiovascular homeostasis. The ability to measure some markers associated with hypertension or the responsiveness of blood pressure to nutritional interventions or to specific therapeutic agents may also have pathogenetic ...
Ram C V - - 1991
Sufficient evidence exists to implicate hypertension as a potent independent risk factor for the development of atherosclerosis. Whereas certain biochemical pathways may play some role in the genesis of atherosclerosis in patients with hypertension, the blood pressure level alone may accelerate the atherosclerotic process. This article discusses the link between ...
Kutschera U - - 1991
The relationship between growth, change in cell osmotic pressure and accumulation of osmotic solutes was investigated in hypocotyls of sunflower (Helianthus annum L.) seedlings. During growth in darkness the osmotic pressure decreased by 50% between days 2 and 6 after sowing. After irradiation of dark-grown seedlings with continuous white light ...
De Rosa L U - - 1991
A 38-year-old female presented for an optometric exam complaining that her "vision had occasionally gone blank while reading during the past 2 months". Although visual acuity was 20/20 in both eyes, hypertensive retinopathy was present in both eyes. Blood pressure was measured to be 210/142. After inadequate response to initial ...
Close C F - - 1991
The association between haemospermia and hypertension was examined in a case-control study comparing 5 hypertensive patients with haemospermia to 20 age-matched hypertensive men. Patients with haemospermia had much higher blood pressures than hypertensive controls (200/131 mmHg vs 147/90 mmHg; P less than 0.0005/P less than 0.0001), higher left ventricular voltage ...
Doyle A E - - 1991
The use of antihypertensive drug treatment has altered the natural history of hypertension. Whereas congestive heart failure, cerebral hemorrhage, and renal failure were the major complications of untreated severe hypertension, myocardial infarction and thrombotic stroke have emerged as the major problems in treated hypertensives. None of the major therapeutic trials ...
Khalil A - - 1991
Thirty six symptomatic hospitalized hypertensive children were evaluated for clinical profile and etiology. They were divided into two groups of 23 and 13 patients, respectively of chronic persistent hypertension and acute transient hypertension. Headache, failure to thrive, dyspnea and edema were common clinical features. Renal parenchymal pathology was the commonest ...
Brunkhorst R - - 1991
The analysis of the hemodynamics accompanying correction of renal anemia by rhEPO shows that--although they behave qualitatively as in nonuremic anemic patients--cardiac output and peripheral resistance may change inadequately and thereby cause a rise of blood pressure. The underlying mechanisms are not yet fully understood but to a great part ...
Pedich W - - 1991
The aim of the study was to analyse the course of isolated systolic hypertension in old age and its influence upon quoad vitam prognosis. A group of 100 persons over 60 was chosen and observed systematically for the period of 10 years in the geriatric out-patients centre. On the basis ...
Yamamoto I - - 1991
Balloon compression of the left IXth and Xth cranial nerves and ventrolateral medulla oblongata in dogs resulted in statistically significant increases in blood pressure without obvious changes in cardiac output. Five of 21 hypertensive patients with trigeminal neuralgia or hemifacial spasm demonstrated normalized blood pressure following microvascular decompression for arterial ...
Deng J F - - 1991
We report an outbreak of tetrodotoxin poisoning resulting from consumption of ovaries of an unidentified species of fish. Thirty victims manifested the typical neurologic symptoms of tetrodotoxin poisoning. Although hypotension is the classically described blood pressure reaction, eight individuals developed hypertension (average blood pressure 192/110 mm Hg); one died of ...
Bernards C M - - 1991
Previous studies have demonstrated that bupivacaine administered directly into the central nervous system (CNS) is capable of producing signs of bupivacaine cardiovascular toxicity. To investigate the mechanisms by which bupivacaine may act within the CNS to produce cardiovascular toxicity, we studied four groups of halothane-anesthetized rabbits in which infusion of ...
Toner J M - - 1990
Hypertension which is resistant to treatment carries a relatively bad prognosis. Factors associated with treatment resistance were examined in a case-control study in a hospital hypertension clinic. Patients with resistant hypertension had more severe hypertension and more frequently had evidence of end-organ damage on presentation to the clinic. The prevalence ...
Jain P - - 1990
This study correlates the fundus signs with the severity and signs of hypertension and evaluates the role of fluorescein angiography in detecting changes in the retinal and choroidal capillary bed in hypertension and defines its advantages over direct ophthalmoscopy. 37 hypertensives belonging to all grades of hypertension were studied. A ...
Djerassi L - - 1990
A survey was carried out in two plants in Haifa, Israel on the prevalence of treated and controlled hypertension. In both plants hypertension treatment was being carried out by family physicians at regular family clinics. In factory A, after screening, a programme of follow-up and treatment by the plant doctor ...
Folkow B - - 1990
The history of research on the "structural factor" in primary hypertension is briefly reviewed, and the gradual realization of its important influence on the hemodynamics of hypertension is outlined, as seen from a "personal angle." Experiences from previous studies of normal vascular function in animals were decisive for our first ...
Hall J E - - 1990
In all forms of chronic hypertension, the renal-pressure natriuresis mechanism is abnormal because sodium excretion is the same as in normotension despite the increased blood pressure. However, the importance of this resetting of pressure natriuresis as a cause of hypertension is controversial. Theoretically, a resetting of pressure natriuresis could necessitate ...
Malo D - - 1990
Although the increased sensitivity of hypertensive animals to heat stress has been reported, the effect of chronic heat exposure has not been examined. The specific goal of the present investigation was to study the impact of chronic heat treatment on the blood pressure of spontaneously hypertensive mice. Chronic 40 degrees ...
Grewal S S - - 1990
Ophthalmodynamometry was done on 100 hypertensive cases and 100 non-hypertensive cases who had clear media and no glaucoma. The ratio of the pressure mean ophthalmic: pressure mean brachial in the non-hypertensive group was 0.71:1.0, which rose to 0.78:1.0 in the hypertensive group. The ophthalmic humeral diastolic ratio increased with the ...
Schork N J - - 1990
This paper concerns the theory and relevance of finite mixtures of univariate and multivariate normal distributions in medical research and suggests that multivariate normal mixture analysis, hitherto not extensively explored, is an appealing approach to the investigation of etiologically obscure, multifactorial diseases such as hypertension. We elaborate a statistical strategy ...
Garner B F - - 1990
A 35-year-old woman presented 9 days postpartum with severe headache, arterial hypertension, and left parietal symptoms. A cerebral angiogram revealed widespread irregular areas of narrowing and dilatation, highly suggestive of vasculitis. The hypertension was treated successfully. A repeat angiogram 9 days later was almost completely normal. As this course is ...
Hillman B J - - 1990
Hypertension is among the most ubiquitous diseases in the world. In the U.S., up to sixty million individuals may be affected by hypertension and be prone to associated renal, cardiac, and CNS damage. This morbidity is mediated by changes in the microcirculation of these organs, resultant of blood pressure elevation.
Nag S - - 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 ...
Granström G - - 1990
Arterial hypertension was found in 78 of 224 consecutive patients operated for nasal polyposis. An exacerbated degree of hypertension was significant in groups aged above 50 years. In total, 46% of patients whose nasal polyposis was of a duration of more than 10 years suffered from hypertension. Fifty of 78 ...
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 ...
< 5 6 7 8 9 10 11 12 13 14 >