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Twenty-four patients with dilated idiopathic (n = 22) or ischemic (n = 2) cardiomyopathy (ejection fraction 0.15 to 0.40) in stable New York Heart Association functional class II or III were entered into a double-blind randomized trial of nebivolol, a new, potent, selective beta 1-antagonist. Exercise time, invasive hemodynamic data (12- and 24-h monitoring) and variables of left ventricular function were examined at baseline and after 3 months of orally administered nebivolol (1 to 5 mg/day, n = 11) or placebo (n = 13).
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In vitro, the effects of nebivolol and ADMA on resting tone or contraction induced by phenylephrine (PE, 10(-6 )mol/L) and relaxation induced by acetylcholine (Ach, 10(-10)-10(-5 )mol/L) were evaluated.
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This real-world study suggests that switching from metoprolol to nebivolol is associated with an increase in medication costs and significant reductions in hospitalizations and outpatient visits upon switching, resulting in an overall neutral effect on healthcare costs. These results may be interpreted with caution due to lack of a comparator group and confounding control caused by design and limitations inherent in insurance claims data.
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Nebivolol is a safe and well-tolerated drug that improves NYHA class, systolic and diastolic LV function in NIDC patients, although it is associated with a lower maximal exercise duration at 3 months.
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In patients with essential hypertension hypotensive action of nebivolol was associated with antiaggregation effect and improvement of blood flow in microvascular networks.
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to compare anti-hypertension effect of monotherapy with nebivolol and dilatrend with dynamics of HRV and the estimation of the state of patients with mild arterial hypertension (AH) and metabolic syndrome (MS).
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This randomized open label study included 85 newly diagnosed patients with stage 1 hypertension (50 males, mean age: 52 ± 9 years). Blood pressure, flow mediated vasodilatation (FMD) and echocardiographic measurements of the patients were taken before and 8 weeks after the beginning of treatment with olmesartan or nebivolol. Nitric oxide, plasminogen activator inhibitor 1 (PAI-1) and C reactive protein (CRP) levels measured in serum samples before and after treatment, were compared. Basal variables that can affect the antihypertensive response were evaluated by multivariate logistic regression analysis.
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We compared the effects of class I-IV antiarrhythmic agents on the ventricular fibrillation threshold (VFT) induced by electrical stimulation directly on the myocardium in anesthetized, open-chest guinea pigs. VFT was assessed by determining the intensity (mA) of electrical current required to induce ventricular fibrillation (VF) and is expressed as a percentage change of the baseline premedication value. The following antiarrhythmic agents or their solvent were administered intravenously (i.v.) to pentobarbital-anesthetized animals (n = 6-12 per group): class I antiarrhythmic agent encainide (1.5 mg/kg); class II antiarrhythmic agents atenolol (2.5 mg/kg), metoprolol (2.5 mg/kg), and nebivolol (2.5 mg/kg); class III antiarrhythmic agents dofetilide (0.08 mg/kg), terikalant (0.04 mg/kg), and DL-sotalolol (10 mg/kg); and class IV antiarrhythmic agent verapamil (0.16 mg/kg). The antiarrhythmic compounds or their solvents resulted in the following changes in the VFT at 15 min after treatment: saline control, 1 +/- 14% (mean +/- SEM) from its baseline value; 10% hydroxypropyl-beta-cyclodextrine (CD), 4 +/- 13%; encainide, 183 +/- 46% (p < 0.05 vs. saline); atenolol, 66 +/- 23% (p > 0.05 vs. saline); metoprolol, 89 +/- 25% (p > 0.05 vs. saline); nebivolol, 224 +/- 58% (p < 0.05 vs. 10% CD); DL-sotalol, 485 +/- 119% (p < 0.05 vs. saline); dofetilide, 357 +/- 69% (p < 0.05 vs. saline); terikalant, 487 +/- 183% (p < 0.05 vs. saline), and verapamil, -17 +/- 21% (p > 0.05 vs. saline). At the doses used, all compounds significantly reduced heart rate (HR).(ABSTRACT TRUNCATED AT 250 WORDS)
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Since endothelial dysfunction may significantly contribute to the pathophysiology of hypertension and its complications, its modification seems to be a very attractive means to favourably affect the development of atherosclerosis and cardiovascular events in hypertensive patients. However, not all antihypertensive drugs consistently improve endothelial dysfunction. While first-generation beta-blockers showed contrasting or null effects on endothelial function, newer beta-blockers of the third generation, such as carvedilol and nebivolol, seem to be provided with specific endothelium-mediated vasodilating effects. Calcium channel blockers are generally able to increase endothelium-dependent vasodilation in several vascular beds, in patients with essential hypertension, probably through multiple mechanisms. Most studies have shown thatACE inhibitors favourably affect endothelial function mainly in the subcutaneous, epicardial and renal circulation, not only by inhibiting the effects of angiotensin II on the endothelium, but also by enhancing bradykinin-induced vasodilation, probably a hyperpolarization-related effect. On the other hand, discordant evidence is available about the effects of angiotensin II receptor type I blockers on endothelial function in patients with essential hypertension, atherosclerosis or diabetes.There are data suggesting that an increased activity of the endothelin- I system may play a role in the blunted endothelium-dependent vasorelaxation of hypertensive patients, an effect that could be contrasted by the use of endothelin-I receptor antagonists. However, to date no substantial clinical efficacy of endothelin-I receptor blockers has been shown in patients with essential hypertension. Finally, other possibly useful compounds in restoring impaired endothelial function in hypertension are some antioxidant agents such as vitamin C, folic acid, the cofactor tetrahydrobiopterin (BH4), L-arginine and the drugs of the statin class.
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We performed a randomized, double-blind, placebo-controlled, cross-over study in 16 healthy men. Subjects received 5 mg nebivolol or placebo once daily for 8 days in random order divided by a drug-free interval of 2 weeks. Forearm blood flow (FBF) was measured by venous occlusion plethysmography 3 h after oral intake of the first and last doses of nebivolol and placebo, respectively. FBF was measured again following the intravenous administration of 4 μg nitroglycerin/kg body weight/min for 5 min.
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This pharmacoeconomic analysis shows that nebivolol is more cost-effective as compared to metoprolol when the cost per reduction in blood pressure per day is considered. This may affect the patients economically during their long-term use of these molecules for the treatment of hypertension.