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

The antihypertensive efficacy and side effects of the combined therapy with propranolol, phenoxybenzamine, and hydrochlorothiazide were examined in 17 patients with moderate and moderately severe hypertension. Following a control period two to three weeks' duration, propranolol was started in nine patients as the sole antihypertensive agent and together with phenoxybenzamine, in eight. By titrating the dosage against pulse rate and blood pressure response, propranolol was given, in divided doses, from 80 to 160 mg and phenoxybenzamine, from 20 to 50 mg per day. When propranolol was given alone in nine patients, for four to 12 weeks, normal blood pressure was not attained in any patients. During three to ten weeks of combined propranolol and phenoxybenzamine therapy in 17 patients, normal blood pressure (150/90 mm Hg or less) or near-normal pressure (150/100 or less) was attained in 12 patients in the recumbent position and in 15 patients in the upright position, while orthostatic hypotension was not observed. Except for a reduction of ejaculation in three out of six male patients, no other side effects were encountered. The addition of hydrochlorothiazide diuretic in all of the above 17 patients, at a dose of 50-100 mg per day with a concomitant decrease in the dose of phenoxybenzamine, produced a further reduction in blood pressure, and normal or near-normal blood pressure was attained in all subjects. Symptomatic orthostatic hypotension, observed in two patients, was treated by a further readjustment of the dose of phenoxybenzamine, while inhibition of ejaculation was persistent in only one patient. It is concluded that the combined administration of propranolol, phenoxybenzamine, and hydrochlorothiazide in individualized doses is very effective in lowering the blood pressure with minimal side effects.
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PMID:Alpha- and beta-adrenergic receptor blocking agents combined with a diuretic in the treatment of essential hypertension. 0 76

Basing on the literature data and their own observations of patients with chronic hemodialysis the authors have analysed the pathogenesis, course, hemodynamic shifts and possibilities of purposeful treatment in terminal uremia. Besides two variants of the hypertension course (controlled and noncontrolled), a third type has been revealed--hypertension difficult to control, in the pathogenesis of which, as well as in the noncontrolled variant, an important role is played by the activization of the renin-angiotensin system. Hemodynamic mechanizms of an abrupt change in the arterial pressure (acute hypotension and hypertensive crisis) in the process of hemodialysis are analysed.
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PMID:[Arterial hypertension and chronic hemodialysis]. 0

The effect of Visken was analysed in children with primary arterial hypertension, Stage IB, with reference to their general state, dynamics of cardiac contractions, arterial pressure, cardiac output, and vascular peripheral resistance. The treatment was undertaken in 28 children lasting from 6 to 8 weeks. A multiformity of the drug's effect upon the state of the children with early hypertension was noted. The response of different parameters of the circulatory system to Visken is individual. Side effects may develop against the background of even low doses.
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PMID:[Use of beta-blockader visken in children with primary arterial hypertension]. 0 1

Fentanyl was used in 100 abdominal surgical interventions, combined with droperidol or with diazepan, always with good results as far as analgesia was concerned. Tensional variations that occurred during the induction were quite small and disappeared during the filling up. In the course of the intervention, tensional variations were only met with subjects suffering from high blood pressure. The respiratory depression that went with analgesia did not constitute an obstacle but made it necessary to use artificial ventilation for the intervetion. The awakening was always quick, smooth, without any vomiting and was influenced neither by the time taken up by the intervention nor by the condition of the patient. No residual respiratory depression requiring the use of an anti-morphinic was noted. At the end of the study, fentanyl appears as a powerful analgesic, easy to use and successful in all the cases of abdominal surgery. Its effect does not last, a drawback that can be avoided by the use of an intravenous drip.
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PMID:[Value of moderate fentanyl dosage during anesthesis in abdominal surgery. Apropos of 100 cases]. 0 82

The possible role of increased vascular reactivity in the mechanism of experimental hypertension was studied by measurements of the critical opening pressure (COP) of tail vessels in conscious rats. In hypertension induced by administration of desoxycorticosterone acetate (DOCA) and replacement of the drinking water by 1% NaCl solution (DOCA-NaCl hypertension), and in one-kidney Goldblatt renovascular hypertension, the raised level of blood pressure was associated with an increased COP of the tail vessels when measured both before and after ganglionic blockade. In rats treated with either DOCA alone or 1% NaCl alone there was no significant increase in systolic blood pressure (SBP) or COP relative to the corresponding controls. In all four experimental series intravenous infusion of angiotensin or norepinephrine in conscious ganglion-blocked rats produced dose-dependent increases in SBP and COP. In DOCA-NaCl hypertensive rats but not in renovascular hypertensives, nor in rats treated with DOCA alone or 1% NaCl alone, the increase in COP for a given increment in dose of angiotensin or norepinephrine was significantly greater than in the control rats. It is concluded that in DOCA-NaCl hypertension there is a true increase in the reactivity of the smooth muscle of the resistance vessels to angiotensin and norepinephrine. In renovascular hypertension this is not the case and other factors must therefore be involved in causing the increased blood pressure and COP.
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PMID:Critical opening pressure and reactivity of tail vessels in conscious hypertensive rats. 0 1

The hypertension induced in adult male rats by doca/salt was found to be accompanied by a significant rise in whole brain tyrosine hydroxylase (TH) activity. A smaller hypertensive effect, produced by angiotensin (750 ng kg-1 daily) was also accompanied by a proportional rise in whole brain TH activity. The specific antagonists spironolactone and saralasin completely blocked both responses in the doca/salt- and angiotensin-treated animals respectively and spironolactone showed a partial inhibition of the effects of angiotensin. In all the animals treated there was a clear correlation between systolic blood pressure and whole brain TH activity. The significance of these changes is discussed in the light of the central mechanism of hypertension.
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PMID:Brain tyrosine hydroxylase activity and systolic blood pressure in rats treated with either deoxycorticosterone and salt or angiotensin. 0 9

The effects of continuous lumbar epidural analgesia for labor and delivery were studied in 20 women with gestational hypertension. Maternal hemodynamics, renal function, acid-base, and blood gas findings were examined together with newborn APgar scores and umbilical vessel blood gas and acid-base values. Minimal change occurred in maternal renal function and hemodynamics. Maternal and bewborn aicd-base and blood gas findings were comparable to those of normotensive control subjects also receiving epidural analgesia. Apgar scores in both groups of subjects wer good. Continuous epidural analgesia is recommended as a useful form of therapy in the management of labor and delivery in women with gestational hypertension.
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PMID:Maternal and fetal effects of lumbar epidural analgesia for labor and delivery in patients with gestational hypertension. 0 86

Prophylactic administration of LL 21-945 [4-(3-tert. butyl-amino-2-pivaloyloxypropoxy)-9-fluorenone] during 15 weeks to Grollman rats depressed the development of hypertension, tachycardia and myocardial pathogical changes. The tachycardia was eliminated and the degree of the myocardial pathological changes and coronary sclerosis was less severe than in the untreated Grollman rats. The survival rate was slightly improved with LL 21-945. With respect to the biochemical parameters studied, only a tendency of LL 21-945 to moderate the rises in blood cholesterol, total glycerides and urea was observed towards the end of the experiment.
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PMID:The effects of the beta-adrenoceptor blocking agent LL 21-945 on renal hypertensive (Grollman) rats. 0 33

The effects of penbutolol (Hoe 893 d), a new non-selective beta-receptor blocking agent, were studied in 5 patients with moderate hypertension. Initially, it was shown that 2-4 mg given orally once or twice daily tended to lower blood pressure and pulse rate, both at rest and following submaximal work. In prolonged trials (3-8 months) 4-60 mg/day were required to produce an acceptable antihypertensive effect. Penbutolol had no effect on the normal increase in plasma noradrenaline and adrenaline on standing, nor did it alter basal urinary catecholamine excretion. Submaximal work caused no significant change in plasma catecholamines before treatment, but there was a marked rise both in plasma noradrenaline and adrenaline during treatment with penbutolol. In short term studies there was a fall in plasma renin by 4 hours after oral administration of penbutolol 2-4 mg, which persisted for 24 hours. Prolonged treatment with penbutolol 20-30 mg twice daily inhibited renin production under basal conditions and following submaximal work, as well as lowered basal urinary aldosterone excretion. In one patient slight asthmatic symptoms appeared after treatment for 3 months with penbutolol. In other respects penbutolol was well tolerated.
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PMID:Long term treatment of moderate hypertension with penbutolol (Hoe 893d). I. Effects on blood pressure, pulse rate, catecholamines in blood and urine, plasma renin activity and urinary aldosterone under basal conditions and following exercise. 0 98

The effect of insulin-induced hypoglycemia on the blood levels of catecholamines and renin activity has been studied in five patients with moderate hypertension before and after treatment for 3 - 8 months with penbutolol (PEN) 20 - 30 mg twice daily. Penbutolol caused no change in fasting blood glucose level. Insulin o.1 IU per kg body weight i.v. reduced blood glucose concentration by approximately 50 per cent after 30 - 45 min, both before and during treatment with penbutolol. Hypoglycemia prior to medication was accompanied by a marked increase in the production of adrenaline and a minor increase of noradrenaline in all five patients. During treatment the response of adrenaline to hypoglycemia was reduced in four patients and the data was inconclusive in one. Basal renin activity was rather low in three patients, within the normal range in one and relatively high in one. Before penbutolol the hypoglycemia-induced increase in catecholamine production caused no change in plasma renin activity in the three patients with low basal levels, whereas a marked increase was observed in the other two. During medication plasma renin activity remained unchanged on induction of hypoglycemia regardless of the catecholamine response. Despite the marked increase in plasma adrenaline following insulin-induced hypoglycemia, no statistically significant increase in pulse rate was recorded.
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PMID:Long term treatment of moderate hypertension with penbutolol (Hoe 893d). II. Effect on the response of plasma catecholamines and plasma renin activity to insulin-induced hypoglycemia. 0 1


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