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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A clinical epidemiological study was conducted to examine systemic blood pressure, hypertension, related features, and the possible influences of urinary schistosomiasis. Data was collected from 2 Nigerian communities--1 with a low level of endemic urinary schistosomiasis and the other with a high level. All data is graphed and tabulated. The study showed that no differences in systolic or diastolic blood pressure could be attributed to urinary schistosomiasis. In fact, hypertension was more common among the population with the low levels of schistosomiasis endemicity. This does not suggest that schistosomiasis protects against hypertension; other factors, especially age and parity in that population, might contribute to hypertension. The study showed that age causes an increase in both systolic and diastolic pressure. Females were more susceptible to systemic hypertension than males. Body weight and height in both males and females and parity in females seemed to be related to hypertension. A headache symptom was not found to be related to hypertension.
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PMID:Studies on the prevalence of renal disease and hypertension in relation to schistosomiasis. IV. Systemic blood pressure hypertension and related features. 31 38

Bronchodilatory and side effects of fenoterol hydrobromide (Th1165a; hydroxyphenylorciprenaline; Berotec) and isoproterenol given by inhalation were compared in a double-blind crossover study involving 20 volunteer subjects with reversible obstructive disease of the airways. Subjects inhaled medications from aerosol canisters containing fenoterol hydrobromide (0.1 mg, 0.2 mg, or 0.4 mg) or isoproterenol (0.15 mg) or an inert placebo propellant in a random sequence of five testing days. All active drugs substantially increased the forced expiratory volume in one second, the mean forced expiratory flow during the middle half of the forced vital capacity, and the specific conductance. The onset of bronchodilation after both fenoterol and isoproterenol was rapid, but the effect from fenoterol lasted much longer, up to eight hours. None of the medications cuased significant tachycardia or hypertension. After inhalation of 0.1 mg of fenoterol hydrobromide, none of the subjects reported nervousness, headache, tremor, or nausea, incontrast with results reported for isoproterenol, higher aerosol doses fo fenoterol, or oral administration of fenoterol. No additional therapeutic benefit was found in the administration of higher doses of fenoterol.
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PMID:Aerosol administration of fenoterol hydrobromide (Th 1165a) in subjects with reversible obstructive airway disease. 33 6

The case report is presented of a 24-year-old male who developed the clinical signs and syptoms of pseudotumour cerebri (intracranial hypertension) twice during the course of protracted rejection 1 and 4 months after renal transplantation. Clinically, headache, nausea, hypertensive crisis and, finally, severe coma with an acute mid-brain syndrome was observed. Neurologically a mild left-sided hemiparesis was found on the second occasion. Examination of the fundi revealed bilateral papilloedema. Electroencephalograms showed pathological changes of a diffuse nature, later followed by abnormal delta range activity in the right frontotemporal projection. The withdrawal of corticosteroid therapy may have been responsible for the pseudotumour cerebri in this case.
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PMID:[Recurrence of pseudotumour cerebri (intracranial hypertension) after renal transplantation (author's transl)]. 34 35

Prazosine, a derivative of quinazoline, acts by relaxing the smooth vascular muscles and blocking postsynaptic alpha-adrenoreceptors. A special protocol was used to treat arterial hypertension in 21 subjects. A small dose (0.5 mg) was given the first day to avoid orthostatic hypotension, then 0.5 mg x 3 on days 2, 3 and 4, followed by 1 mg x 3 on subsequent days. Dosage can be progressively increased up to 30 mg/day. During the first 36 days of treatment, prazosine was given alone. A significant drop in systolic and diastolic arterial pressure was observed in the reclining subject. The effect on orthostatic pressures were nevertheless significantly lower than before initiating treatment. Prazosine induces only a slight increase plasma renin activity. In 9 patients the use of prazosine alone at 3 to 6 mg per day produced not only a drop in arterial pressure but its normalization. In 5 other patients, the administration of prazosine associated with a beta-blocker, acebutolol, induced normalization of arterial pressure. The association of prazosine with a thiazide diuretic was not considered successful. In 5 patients, treatment was interrupted with the appearance of coronary insufficiency, orthostatic hypotension and frequent headaches. Minor side-effects observed in 8 others patients did not require interruption of treatment. Based on the above results, it can be stated that prazosine is an efficient new peripheral vasodilator with good patient tolerance for the treatment of arterial hypertension.
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PMID:[Prazosine: a new vasodilator used for treatment of hypertension (author's transl)]. 37 Jul 66

Hemodynamic monitoring after a single dose (10 mg) of nifedipine in 27 primary hypertensive subjects (diastolic pressure greater than 110 mm Hg) documented that this calcium antagonistic agent exerts a potent arteriolar vasodilating action, which results in prompt (-21% of control at 30 minutes) and persistent (-16% of control at 120 minutes) fall in mean arterial pressure associated with a rise in cardiac output and pulse rate. The same patients received oral treatment for 3 weeks. Hourly pressure readings showed that 1) the antihypertensive response to each dose lasts 8--12 hours; and 2) nifedipine every 6 hours significantly reduced blood pressure throughout the 24 hours, without postural hypotension. Side effect were short-lasting (headache in five patients, palpitation without arrhythmias in eight patients, burning sensation in the face and legs in five patients and sporadic extrasystoles in five patients) and tended to disappear with continued treatment. Development of drug resistance, sodium retention, plasma volume expansion, renin release or angina pectoris were not observed during the study. Although these findings seem to differentiate nifedipine from other vasodilators currently used in the treatment of hypertension, broader experience and more prolonged trials with nifedipine as an antihypertensive agent will be needed before conclusions can be drawn on these particular aspects.
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PMID:Treatment of hypertension with nifedipine, a calcium antagonistic agent. 37 56

With advancing age blood pressure rises in most populations with the exception of some isolated tribes. In western countries 30 to 40% of the people above the age of 60 years have casual blood pressure levels greater than or equal to 160/95 mm Hg. Advancing age per se produces a number of physiological changes related to blood pressure, such as a decrease in cardiac output, an increase in peripheral vascular resistance and a decrease in plasma renin-angiotensin-aldosterone levels. The mechanism causing the elevation in pressure with age are unknown though increased rigidity of the great vessels contributes to the rise in systolic pressure. There is a decline in the sensitivity of the baroreceptor reflex, but the contribution of this to the elevation of pressure has not be elucidated. Elderly patients with uncomplicated essential hypertension have a low cardiac output and high peripheral vascular resistance. The rise in blood pressure is associated with an increased cardiovascular morbidity and mortality even in the elderly hypertensives. The available data on the efficacy of hypotensive treatment in the elderly is scanty. There are no data proving that hypotensive therapy prolongs life. Controlled studies on the prevention of organ damage especially cerebrovascular accidents are inconclusive, showing either a significant decrease or no effect. Isolated reports illustrate, however, that drastic blood pressure reduction can provoke serious side effects, thus decreasing the quality of life. Hypotensive treatment is indicated in elderly hypertensive patients with hypertensive retinopathy grade III or IV, congestive heart failure or cerebral haemorrhage, in elderly patients with a markedly elevated diastolic blood pressure (greater than or equal to 120 mm Hg) and a trial of hypotensive therapy should be offered in milder forms of hypertension when it is accompanied by certain specific symptoms such as angina, headache and dyspnoe. The management of elderly hypertensive patients is more difficult than in the young. General measures are often not well accepted. The dose adjustment of the hypotensive agent is more critical and volume depletion or orthostatic hypotension are more likely to occur.
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PMID:Aging and the cardiovascular system. 37 49

Although oral contraception (OC) offers reliable and esthetic contraception for 40-50 million women in the world today, serious complications do occur with its use and must be considered in a basic risk-benefit equation. Thorough knowledge of these complications and their predisposing factors may guide the selection of patients for OC use and management of its use. The following complications are reviewed: Vascular thrombosis (cerebrovascular disease, coronary artery disease), hypertension, carbohydrate metabolism, lipid metabolism, neoplasms (cervical tumors, breast tumors, endometrial carcinoma, benign tumors of the uterus and ovary, liver tumors), subsequent reproductive function (outcome of pregnancy), subjective effects (emotional state), gallbladder disease, liver function, and other effects. The incidence of complications may be decreased by proper prescribing and selection of patients. OC use in hypertensive or diabetic patients is not recommended. They should be used with caution in the younger obese patient and not used in the obese patient over age 35. OC may be prescribed for women over age 35 who do not smoke or have any other risk factor and who are apprised of the possible but uncertain degree of increased risk of coronary occlusion from pill use alone. Women with headaches developing or increasing with OC use should discontinue this method of contraception. It is recommended that women with any of these risk factors who have completed their desired families should be offered surgical sterilization.
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PMID:Oral contraception. 38 49

A large, open, multi-centre study was carried out in general practice to evaluate the effectiveness and tolerance of a combination of 10 mg pindolol plus 5 mg clopamide, in single tablet form, in the treatment of patients with essential hypertension. Computer analysis of the records of 8989 patients who completed the 8-weeks' study period showed that treatment with the combination product, in a dosage of 1 tablet daily in 83% of the patients, resulted in excellent blood pressure control in the majority (75%) of cases, irrespective of age or previous antihypertensive treatment, and was particularly effective in those with mild to moderate hypertension who had previously not received any therapy. Side-effects were generally not troublesome and only 8.3% of patients stopped treatment for this reason. The most commonly reported side-effects were dizziness, nausea, tiredness and headache.
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PMID:A multi-centre general practice trial of a pindolol/clopamide combination ('Viskaldix') in essential hypertension. 39 10

The course of the illness in a six-year-old boy is reported. His recurrent headaches led to the detection of arterial hypertension (170/135 mmHg). Clinical and histological examination revealed neurofibromatosis von Recklinghausen. A bilateral paraumbilical murmur hinted at a renovascular form. Arteriography showed an aneurysm of the right renal artery and multiple bilateral intrarenal stenoses and aneurysmatic dilatations. Under conservative treatment with Propranolol and Dihydralazine blood pressure remained almost normal over two years. 38 paediatric cases of renovascular hypertension in childhood reported in the literature are analyzed with regard to clinical manifestation, morphology and localisation of the renovascular lesions.
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PMID:[Renovascular hypertension in neurofibromatosis von Recklinghausen (author's transl)]. 41 39

A rare case of malignant paraganglioma of the urinary bladder with metastasis to a lymph node in a 12-year-old girl is reported, and eight other previously recorded cases are reviewed. Headache, fainting, and hypertension initiated by voiding were the most prominent clinical symptoms. Hematuria was present in three cases and aided in prompt diagnosis. Cystography, pelvic angiography, and cystoscopy were most diagnostic. Segmental cystectomy when feasible, was the preferred surgical treatment. The prognosis was slightly better than for other forms of extraadrenal pheochromocytomas.
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PMID:Malignant paraganglioma (pheochromocytoma) of the urinary bladder: report of a case and review of the literature. 45 May 24


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