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Results 351 - 400 of 1028
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Saadjian A - - 1993
It has been suggested that almitrine improves the local ventilation/perfusion ratio by enhancing hypoxic pulmonary vasoconstriction (HVC), leading to an increase in pulmonary vascular resistance (PVR) and PaO2. The goal of the present study was to determine if pulmonary vasodilation induced by nifedipine inhibits the enhancement of HVC (and consequently ...
Munger M A - - 1993
STUDY OBJECTIVE: To determine the acute hemodynamic response of single-dose coadministration of ibopamine plus nifedipine or diltiazem in patients with New York Heart Association functional class (NYHA FC) II-III congestive heart failure. DESIGN: A single-blind, placebo-controlled, two-paired, crossover study. SETTING: Cardiology clinics at two large teaching hospitals. PATIENTS: Eight patients ...
el Hawy A M - - 1993
The pathogenesis of bilharzial pulmonary hypertension differs from the hypoxic type of pulmonary hypertension. Nifedipine [corrected] a calcium channel blocker was tried as a treatment for lowering pulmonary artery pressure. Nifedipine [corrected] 20 mg sublingually was found to lower the pulmonary artery pressure but not to a statistically significant level. ...
Kumar N - - 1993
Thirty women with pregnancy-induced hypertension (PIH) scheduled for Caesarean section under general anaesthesia were studied to evaluate the efficacy of sublingual nifedipine in attenuating the pressor response to laryngoscopy and tracheal intubation. The patients were randomly given either the contents of a nifedipine capsule 10 mg or placebo sublingually 20 ...
Borow K M - - 1993
OBJECTIVES: This study was designed to noninvasively assess the direct action of calcium channel blockers on left ventricular contractility in humans and to establish a framework for determining the importance of reflex sympathetic responses to any pharmacologic intervention. BACKGROUND: Assessment of left ventricular contractility in patients taking calcium channel blockers ...
Cesarone M R - - 1993
Vasoconstriction is considered an important factor in patients with hypertension. The presence of skin flow reduction and the decrease in the venoarteriolar response (the skin flow decrease due to postural changes such as standing of lowering the leg below heart level) were studied in normal subjects and in patients with ...
Jangid D R - - 1993
Acute effects of Nifedipine, a calcium channel blocking agent (CCBA), on central haemodynamics in patients with severe hypertension and angiographically proved coronary artery disease (CAD) has been studied using Nuclear Ventriculography (MUGA). While peripheral vasodilatation leads to significant reduction of systemic blood pressure in all severe hypertensive patients (p < ...
Griebenow R - - 1993
The comparative efficacy of the calcium antagonists isradipine and nifedipine in reducing left ventricular peak systolic wall tension was assessed in 25 patients with essential hypertension (20 men, 5 women; mean age: 49 years). After 2 weeks of treatment with either isradipine (2.5 mg twice daily) or slow-release nifedipine (20 ...
Meredith P A - - 1993
Comparison of first- and second-generation calcium antagonists: Despite their diversity of structure, the first-generation calcium antagonists nifedipine, verapamil and diltiazem all have a short elimination half-life and a relatively short duration of action. In contrast, there appears to be wide diversity in these properties among the newer calcium antagonists, which ...
Dei Cas L - - 1993
The acute and chronic effects of the dihydropyridine calcium antagonist nisoldipine were studied in patients with chronic heart failure (LV EF < .35; peak VO2 < 25 ml/kg/min) caused by idiopathic or postinfarction cardiomyopathy. The study group initially consisted of 16 patients; two patients were excluded from the acute study ...
Hoffbrand B I - - 1993
Twenty-eight patients (11 Caucasian, 17 black) whose blood pressure was more than 160/96 mmHg after 4 weeks on placebo added to atenolol 100 mg/day were randomly given, in addition, nisoldipine 10 mg or nifedipine 20 mg each twice a day for 8 weeks in a double-blind cross-over study. There was ...
Voet D - - 1993
In a randomized, double-blind, placebo-controlled crossover study the acute effect of isosorbide dinitrate (ISDN) on the superior mesenteric artery velocity waveform was studied in 10 healthy subjects (mean age 48.2 years) over a 10-minute period. The superior mesenteric artery pulsatility index (PI), which quantifies the blood velocity waveform, increased from ...
Figiel G S - - 1993
Serious cardiac complications have been reported to occur in elderly depressed patients during a course of electroconvulsive therapy (ECT). As a result, cardiac medications are being used more often to dampen the cardiovascular response that occurs during an ECT treatment. Specifically, labetalol (a mixed alpha- and beta-blocker) has been shown ...
Wu S G - - 1993
Hypertensive emergencies in hemodialysis require immediate therapy, usually by parenteral drug administration; however, sublingual medications may have potential in this special condition. Sublingual captopril (25 mg), nifedipine (10 mg) and prazosin (2 mg) were prescribed to determine the effectiveness and safety of each medication in the treatment of hypertensive emergencies ...
Montastruc P - - 1993
The effects of an acute intravenous injection of oxodipine (5, 20 and 50 micrograms/kg), a new dihydropyridine calcium channel blocker, on blood pressure and heart rate were investigated in arterial neurogenic hypertension elicited in anesthetized dogs by acute sinoaortic denervation. This model is associated with disruption of baroreflex pathways and ...
Leonetti G - - 1993
Whether antihypertensive agents exert an antiatherosclerotic effect by blood pressure reduction or independently of their antihypertensive effect is clinically relevant. Animal studies have generally shown that the calcium antagonist verapamil has a preventive rather than a therapeutic antiatherosclerotic effect, which is independent of its antihypertensive effect. However, doses used in ...
Soons P A - - 1993
The effects of racemic (rac) felodipine, rac-nitrendipine and nifedipine (all 20 mg solution p.o.) on non-invasively measured blood pressure and heart rate were investigated in a randomised, double-blind, cross-over study in 12 normotensive, young, healthy males. Compared to baseline values, heart rate increased more after rac-felodipine treatment (+47% at maximum) ...
Bussmann W D - - 1992
To determine whether nitroglycerin is as effective as nifedipine in lowering the blood pressure in severe hypertension and hypertensive crisis, two groups of 20 patients received in random sequence either 1.2 mg nitroglycerin sublingually or a 10-mg nifedipine capsule, which was chewed and swallowed. The blood pressure fell after 5 ...
Imai Y - - 1992
The antihypertensive effect of slow release nifedipine (CAS 21829-25-4) tablets (20 mg, Adalat) administered once or twice daily was studied in patients with essential hypertension of WHO stage I or II. Ambulatory blood pressure was monitored by a finger volume oscillometric device every 5 min for 24 h before and ...
Stratos C - - 1992
PURPOSE: The purpose of the present investigation was to study the distensibility of the ascending aorta in patients with arterial hypertension and normal subjects before and after administration of a calcium antagonist, nifedipine. PATIENTS AND METHODS: The distensibility of the ascending aorta was measured before and after nifedipine administration in ...
Duggan P M - - 1992
Doppler studies of the uterine and umbilical arteries were performed in 24 acutely hypertensive pregnant women. Women were divided into 2 groups: Group 1 (diastolic blood pressure (DBP) > 110 mm Hg) received placebo (n = 6) or 10 mg oral nifedipine (n = 9); Group 2 (DBP > or ...
Cesarone M R - - 1992
In 40 patients with idiopathic systemic hypertension, skin blood flow was evaluated with laser-Doppler flowmetry, transcutaneous measurements of partial pressure of oxygen (PO2) and partial pressure of carbon dioxide (PCO2), and determination of capillary permeability before and after treatment with nifedipine (10 mg tid for four weeks). Also 35 normal ...
Tranquilli A L - - 1992
OBJECTIVES: Our objectives were to assess erythrocyte aggregation in hypertensive pregnancy and to evaluate the effect of the antihypertensive treatment on it. STUDY DESIGN: The mean entity of erythrocyte aggregation was determined by an automatic aggregometer in 57 pregnant women: 20 normotensive, seven chronically hypertensive, 10 chronically hypertensive with superimposed ...
Achike F I - - 1992
Hearts from male Sprague-Dawley rats were perfused, by the Lagendorff method, with calcium-free Krebs solution (containing either adrenaline or a high level of potassium) at pH 7.48 (control), 7.26 (acidosis) or 7.69 (alkalosis). When the hearts stopped contracting, a dose of nifedipine or its vehicle was given before measuring the ...
Jakobsen J - - 1992
To study the pharmacological interaction between a dihydropyridine derivative (nifedipine slow release 20 mg) and inhibition of the renin-angiotensin system (benazepril 10 mg). Single application at intervals of 2 weeks in an open-label three-way cross-over design. Institutional pharmacological unit. Nine healthy male volunteers. Blood pressure and heart rate were recorded ...
Roberts D H - - 1992
In a double-blind, crossover trial 12 patients with hypertension and peripheral arterial disease were randomized to three months' treatment with captopril 25-50 mg twice daily or nifedipine SR 20-40 mg twice daily. While both treatments were equally effective at lowering blood pressure, postexercise calf blood flow availability was greater during ...
Schulte K L - - 1992
Casual as well as ambulatory 24-hour blood pressure (BP) and echocardiographic parameters were studied in 40 patients with untreated or insufficiently treated mild to moderate essential hypertension. Left ventricular (LV) hypertrophy was assessed before and after 24 weeks of therapy with either the converting enzyme inhibitor perindopril or the calcium ...
Schmidlin O - - 1992
Age effects on responses to calcium channel blockade with nifedipine were studied in isolated Langendorff-perfused Fischer 344 rat hearts. Responses to 25 min of perfusion with nifedipine concentrations of 0, 25, 50, 75, and 100 ng/ml were studied in hearts from 11 mature (6 months) and 13 senescent (23-27 months) ...
Bond A - - 1992
Selective L-type voltage-operated calcium channel (VOCC) antagonists nicardipine, diltiazem and verapamil all produced pronounced falls in mean arterial blood pressure (MAP) in the anaesthetized artificially ventilated guinea-pig. This fall in MAP was associated with a significant reduction of the pressor response induced by i.v. noradrenaline. omega-Conotoxin GVIA (CgTx) a preferential ...
Murdoch J C - - 1992
AIMS: to compare lisinopril and nifedipine in the management of essential hypertension in 52 patients in general practice with respect to the obtaining of target diastolic blood pressure and freedom from side effects. METHOD: an open label, parallel randomised trial over an eight week period. RESULTS: lisinopril and nifedipine were ...
Irzyniec T - - 1992
The effect of calcium channel blockers on the development of glomerulosclerosis and progression of renal failure in different models of renal injury is still controversial. We compared the effects of blood pressure lowering with high doses of nifedipine (27 mg/kg body weight/day) and with the sympatholytic agent moxonidine (8 mg/kg ...
Araki H - - 1992
The effects of nipradilol, a nonselective beta-blocker with vasodilator activities, on the diameter of arterioles and venules were examined in rat mesentery in vivo and were compared with those of propranolol, atenolol, labetalol, nifedipine and nitroglycerin. Topical application of nipradilol (10(-7) M and 10(-6) M) dilated the arterioles significantly to ...
Lacourcière Y - - 1992
This double-blind, parallel-group study compared the effects of nebivolol, a novel cardioselective beta-blocker, with those of nifedipine sustained-release on 24-hour ambulatory blood pressure and plasma lipoprotein levels. After a washout period of 8 weeks, 51 patients with mild to moderate essential hypertension were randomized to double-blind treatment with either nebivolol ...
Correia J F - - 1992
Reduction of high blood pressure has an effect on coronary mortality and morbidity lower than expected. One of the possible explanations is the different anti-atherogenic capacity of anti-hypertensive drugs. Reduction of high blood pressure has, by itself, an anti-atherogenic effect, but, for some anti-hypertensive drugs, there is experimental and clinical ...
Ogawa N - - 1992
The effect of KRN2391 [N-cyano-N'-(2-nitroxyethyl)-3-pyridinecarboximidamide monomethanesulfonate] on the cardiovascular system and on myocardial oxygen consumption was compared with that of nicorandil and nifedipine in anesthetized dogs. Intravenous administration of KRN2391 (3-30 micrograms/kg) and nifedipine (1 and 3 micrograms/kg) decreased mean aortic blood pressure and total peripheral vascular resistance, and increased ...
Sunkel C E - - 1992
1,4-Dihydropyridine (DHP) derivatives with a 1,2-benzisothiazol-3-one 1,1-dioxide group, linked through an alkylene bridge to the C-3 carboxylate of the DHP ring, with both vasoconstricting and vasorelaxant properties were obtained. In blocking Ca(2+)-evoked contractions of K(+)-depolarized rabbit aortic strips, compounds 12 and 41 were 10-fold more potent than nifedipine; 27 other ...
Agostoni P - - 1992
In untreated patients with uncomplicated essential hypertension, exercise induces an abnormal increase in blood pressure; the influences of this increase on exercise were evaluated by a cardiopulmonary exercise test (CPX) performed in control conditions (step 1) and during acute blood pressure reduction (step 2). Patients were classified as (1) normotensive ...
Khoury A F - - 1992
The marked increase in cardiovascular events that occur in the early morning hours could be related to a significant rise in blood pressure at this time but there is uncertainty as to whether this rise in pressure occurs before, at, or after awakening. Automatic blood pressure and pulse measurements were ...
Diker E - - 1992
Nifedipine, a calcium-channel-blocking agent, was administered orally to 44 untreated patients (Group A) and sublingually to 51 untreated patients (Group B) who had a diastolic blood pressure more than 90 mm Hg and systolic blood pressure more than 140 mm Hg. The mean pretreatment systolic and diastolic blood pressure values ...
Eber B - - 1992
For several reasons, increasing numbers of patients with hypertension are treated with angiotensin-converting enzyme inhibitors and calcium channel blockers. In a twenty-four week, double-blind, randomized, parallel study, the antihypertensive effect of lisinopril (20 to 80 mg qd) and nifedipine (20 to 80 mg bid) were compared in 21 patients. Fourteen ...
Haustein K O - - 1992
The effect of calcium antagonist nifedipine (N) was studied in the changes of blood pressure, total peripheral resistance, activity of the transport membrane ATPase of erythrocyte ghosts, the plasma level of digitalis-like factor and the plasma renin activity. The studies were performed in 10 healthy volunteers and in 19 hypertensive ...
Khuroo M S - - 1992
1. Twenty-eight patients who fulfilled entry criteria for sphincter of Oddi dysfunction were randomly allocated to receive nifedipine and placebo in a cross over design with 12 week treatment periods separated by a 2 week wash-out. 2. All patients had episodic pain resembling biliary pain, had previously undergone cholecystectomy, had ...
Soons P A - - 1992
The intraindividual variability in pharmacokinetics and effects of oral nifedipine (10 mg), administered with 1 week intervals, was investigated in twelve young healthy subjects. The population estimate of the coefficient of intraindividual variability (CVw) in AUC of nifedipine (13%) was much smaller than the pure between-subject variability (CVb 54%). The ...
Wimmer M - - 1992
The hemodynamic effect of long-term nifedipine medication was studied in 10 children, 3-12 years of age, five with ventricular septal defect and five with complete atrioventricular septal defect; all had Eisenmenger's reaction, seven also had Down's syndrome. They underwent heart catheterization prior to and during 1-4 years of nifedipine therapy. ...
Smout A J - - 1992
The effects of nifedipine (20 mg orally) on esophageal body resting tone and perception of esophageal distension were compared with those of placebo in 10 healthy volunteers, using a double-blind crossover design. A 3-cm silicon balloon positioned 10 cm above the lower esophageal sphincter was inflated with 2-20 ml of ...
Belfort M A MA Department of Obstetrics and Gynaecology, University of Cape - - 1992
The calcium antagonist nisoldipine (Bayer-Miles) was given orally (20 mg, 8-hourly) in the management of 12 selected cases of severe postpartum pregnancy-induced hypertension (PIH). Each patient acted as her own control in this pilot study. A rapid fall in systolic (P less than 0.01) and diastolic (P less than 0.01) ...
Nishimura H - - 1992
This study investigated whether nifedipine administered in divided daily doses would diminish left ventricular hypertrophy (LVH) in spontaneously hypertensive rats (SHR). We administered nifedipine (12 mg/kg/day) in 3 divided doses by gastric gavage to 15-week-old male SHR (n = 10) for 4 weeks. Age- and sex-matched SHR served as controls ...
Burnstein A - - 1992
Nifedipine, a calcium channel blocker, has been used to treat autonomic hyperreflexia in quadriplegics undergoing invasive urological procedures. We present a case of autonomic hyperreflexia triggered by extracorporeal shock wave lithotripsy in which nifedipine was used successfully to treat the hypertensive crisis on 1 occasion and subsequently it was used ...
Chibana T - - 1992
Effects of FRC 8653, a new dihydropyridine derivative, on regional blood flow, cardiac function and myocardial oxygen consumption were examined and compared with those of nifedipine in anesthetized open-chest dogs. Intravenous administration of FRC 8653 at doses of 1, 3 and 10 micrograms/kg dose-dependently decreased aortic pressure and increased aortic, ...
Komsuo─člu S S - - 1992
Hypertensive emergencies, including hypertensive encephalopathy represents an acute threat to vital organ functions and call for urgent treatment. The intravenous medications currently available for the management of hypertensive emergencies, have significant potential for serious side effects and acute lowering of blood pressure has often been the cause of considerable morbidity ...
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