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

The children in the population of the district of Prague 4 were screened for the prevalence of hypertension. From the age group 6--11 years (1st--5th forms), a representative sample was selected, comprising 2 152 children; of the age group 12--19 years (6th--9th forms and adolescents), 90% of the population (11 323 individuals) were examined. The arbitrarily set criteria of hypertension 130/80 mmHg in the children aged 6--11 years and 135/80 mmHg in those aged 12--19 years, were found acceptable for identification of potential hypertonics. In the population examined, such or higher pressures were found in 0.5--3.4% of the subjects examined. By thorough clinical and laboratory examinations of children aged 11--15 years with elevated blood pressures the participation of secondary hypertension was determined. In comparison with a control group, these children exhibited statistically significantly more frequent diseases, obesity, and faulty regimen of living, as well as hypertension in their parents.
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PMID:Prevalence of hypertension in children and adolescents. 100 Sep 86

The angiotensin antagonist saralasin (1-sar-8-ala-angiotensin II) was given to 27 patients with different forms of secondary hypertension. The blood pressure fell in 6 of 7 patients with renal artery stenosis and in 4 of 10 patients with terminal renal failure on regular hemodialysis. No change or a rise in blood pressure was observed in 3 patients with Cushing's syndrome, 4 patients with primary aldosteronism, 3 patients with hypertension and a unilateral small kidney of other than renovascular origin, and 6 patients with terminal renal failure. It can be concluded from the results that angiotensin II is involved in the pathogenesis of renovascular hypertension and in some cases of hypertension accompanying chronic renal failure.
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PMID:[Effect of the angiotensin antagonist saralasin (1-sar-8-ala-angiotensin II) on the blood pressure in secondary hypertension]. 101 96

1. Eighty unselected hypertensive subjects were investigated at a cost of $78.00 per patient, in a short out-patient study programme. Seven (9%) were found to have a cause for their hypertension; incidental abnormalities were found in twenty-two (28%). 2. The combination of clinical selection and planned out-patient investigation should detect all patients with secondary hypertension.
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PMID:Results and costs of investigating newly detected hypertensive patients. 107 19

During the first 5 years of a community-based referral hypertension clinic, 331 ambulatory patients referred for diagnostic evaluation. Thirty-four patients were judged to be normotensive on the basis of resting blood pressures on 3 separate days. In 51 patients the diagnosis was borderline hypertension and 220, essential hypertension. Twenty-six patients (10.6%) had secondary hypertension. Twenty-one patients with secondary hypertension were first recognized from the data of the history, physical examination, and routine urinalysis. The main cost per patient of the initial and further evaluations was computed for each group of patients. The average cost to identify one case of secondary hypertension in the clinic was $2083. Because of the large problem with hypertension in the United States today, the cost-effectiveness of various approaches to the evaluation of patients with hypertension requires thoughtful reappraisal.
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PMID:Cost and yield of the hypertensive evaluation. Experience of a community-based referral clinic. 113 86

Previous attempts to assess sympathetic nervous system activity in patients with hypertension have used a variety of physiologic, pharmacologic and biochemical techniques. Results have been conflicting and confusing. Recently, the activity in plasma of the catecholamine synthesizing enzyme, dopamine-beta-hydroxylase (DBH), has been proposed as an index of sympathetic nervous system activity. Studies of apparently healthy subjects show that high values (greater than 60 units per liter) for plasma DBH activity correlate with pronounced daily lability of blood pressure and frequent readings greater than 130/85 mm of mercury. Studies of patients referred for evaluation of established hypertension show significantly higher values for plasma DBH activity in patients with primary hypertension than in those with commonly recognized forms of secondary hypertension-that is, renovascular, renal parenchymal and adrenocortical. Therefore, the measurement of plasma DBH activity may be helpful in the study and differential diagnosis of hypertensive diseases. Measurement of DBH in plasma is inexpensive, reproducible and relatively easy to do.
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PMID:Dopamine-beta-hydroxylase. An index of adrenergic function in hypertensive patients. 117 15

Elevated serum DBH (dopamine-beta-hydroxylase) activity was found in essential hypertension. The elevated level was not reduced when blood pressure was brought to normotensive level by administration of thiazide or rauwolfia. In contrast, serum DBH activity was low in both normotensive and hypertensive patients treated on prolonged hemodialysis. However, there was no correlation between serum DBH activity and blood pressure level. It was suggested that the pathogenesis of high blood pressure might be different between essential hypertension and hypertension with chronic renal failure, and that measurement of serum DBH activity might help for clinical differentiation of essential hypertension from certain forms of secondary hypertension.
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PMID:Serum dopamine-beta-hydroxylase activity in essential hypertension and in chronic renal failure with hypertension. 119 6

The prevalence of primary and secondary hypertension and of heart and kidney involvement was thoroughly studied in 689 hypertensive subjects derived from a blood pressure screening examination of a total population sample of Swedish men (n = 7,452). The prevalence of secondary hypertension was found to be only 5%, the prevalence of surgically curable hypertension being even lower. Left ventricular hypertrophy and slight heart enlargement were each found in about one-third of the hypertensive patients, while severe heart enlargement, left ventricular hypertrophy on ECG, proteinuria, abnormal serum creatinine and urinary sediment were each found in about 5%. On the basis of these findings, a minimum pre-treatment workup in uncomplicated hypertension is proposed.
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PMID:Pre-treatment workup for antihypertensive treatment. 127 68

Angiotensin-converting enzyme (ACE) inhibitors are now widely used as first-line treatment of essential hypertension. Their effectiveness is potentiated by a low-salt diet and, above all, by the simultaneous prescription of diuretics. When secondary hypertension is suspected, ACE inhibitors are a good pharmacological tool to study the renin-angiotensin system. Since activation of this system is the main mechanism responsible for renovascular hypertension, ACE inhibitors are very useful for diagnosis. Conversely, blood pressure is not influenced by ACE inhibitors in primary hyperaldosteronism because of the low plasma renin and angiotensin II levels. Pheochromocytoma activates the renin-angiotensin system, and ACE inhibitors combined with beta-blockers enable the hypertension to be controlled prior to surgical treatment of the tumour. Finally, ACE inhibitors can be used to explore the renin-angiotensin system in the experimental model of renovascular hypertension and therefore contribute to our knowledge of the complex pathophysiology of this most frequent type of secondary hypertension.
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PMID:[Usefulness of converting enzyme inhibitors in the diagnosis of arterial hypertension]. 129 39

Study of intrarenal vasculature was carried out by using the metallic impregnation technique on whole kidney sections in 31 [corrected] cases of (primary and secondary) hypertension and 10 normal controls. Distinct patterns of intrarenal vasculature were noted in controls and in cases of hypertension. Gradual tapering of vessels, absence of tortuosity and good peripheral vascularisation were noted in controls. Abrupt tapering, tortuosity of vessels and poor peripheral vascularisation were noted in hypertensive cases. In essential hypertension moderate to severe changes of dilatation of the segmental and/or arcuate arteries was noted. The degree of dilatation was related to the level of systolic BP rather than diastolic in cases of essential hypertension. Secondary hypertension even if severe, rarely showed significant dilatation lesions. Avascular zones and conglomeration of vessels at poles was seen only in cases of pyelonephritis. This helped in distinguishing these, from cases of glomerulonephritis.
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PMID:Study of intrarenal vasculature in cases of primary and secondary hypertension (by metallic impregnation technique on whole kidney section) 130 86

The authors present the etiology and the epidemiology of the hypertension in children. It is emphasized how important is to know the hypertension in children, which would allow to adopt measures in order to overt the hypertension's disasters in adults. It is defined the hypertension in children and there is presented the normal range od the arterial blood pressure as well as the methodology of measuring blood pressure in the arteries. There are presented the aspects concerning the incidence and the prevalence rates of hypertension in children, the factors that influence blood pressure and especially the risk markers. There are also brief presented the essential-hypertension and the etiology of the secondary hypertension.
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PMID:[Arterial hypertension in children. I. The epidemiological and etiological aspects]. 132 15


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