Active clinical trials for "Hypertension"

Study objectives: To demonstrate the effect of irbesartan on the regulation of diastolic blood pressure, in case of missing one dose after a period of administration for 6 to 8 weeks To evaluate the safety of irbesartan

This study will examine the use of hydroxyurea and erythropoietin for treating sickle cell disease in patients who also have kidney disease or pulmonary hypertension (high blood pressure in the lungs). Hydroxyurea increases production of fetal hemoglobin in the red blood cells of patients with sickle cell disease, reducing the amount of sickle cells that cause pain and other complications requiring hospitalizations. However, hydroxyurea treatment has limitations: patients with sickle cell disease who have developed kidney disease may not be able to get the full benefit of the medicine, and hydroxyurea alone may not be able to treat life-threatening complications such as pulmonary hypertension or stroke. This study will determine which of two dosing schedules of hydroxyurea and erythropoietin is more effective for treating patients with sickle cell disease who also have kidney disease or pulmonary hypertension, and will examine whether the two drugs can lower blood pressure in the lungs. Patients 18 years of age and older with sickle cell anemia and kidney disease or pulmonary hypertension, or both, may be eligible for this study. Candidates are screened with a medical history, physical examination, blood tests, a 6-minute walk test (test to see how far the subject can walk in 6 minutes), and echocardiogram (ultrasound of the heart to measure blood pressure in the lungs). Participants undergo the following tests and procedures: Stabilization Phase: Patients take 2 hydroxyurea tablets a day until their fetal hemoglobin levels stabilize, usually over 2 to 4 months. They have blood tests every 2 weeks to monitor hemoglobin and fetal hemoglobin levels. At some time during this period, they undergo a test to measure kidney function, in which they are injected with an iodine-containing dye and wear a small pump for 1 day that injects a small amount of dye under the skin over 24 hours. They come to the clinic for 2 or 3 blood tests collected over 4 hours. Sequence I (Standard): When the fetal hemoglobin levels have been stable for 2 months, patients have a repeat echocardiogram and 6-minute walk test. Erythropoietin is then added to the hydroxyurea regimen. It is given 3 days a week, as an injection under the skin, along with iron supplements. Patients have blood tests and blood pressure measurements every week or every other week. Patients with pulmonary hypertension have another echocardiogram and 6-minute walk test once the hemoglobin level is stable. Sequence II (Cycled): When hemoglobin levels have stabilized with hydroxyurea once a day and erythropoietin 3 times a week, the hydroxyurea is adjusted so that the amount taken in 7 days is "cycled" over 4 days, and the erythropoietin is cycled over 3 days, with the dose increased twice, every 3 to 4 weeks. Blood pressure and hemoglobin are monitored once or twice a month. Patients with pulmonary hypertension have another echocardiogram and 6-minute walk test once the hemoglobin level is stable. Patients who develop complications while taking the drugs have their treatment regimens adjusted as needed.

Demonstrate that telmisartan 80mg was at least as effective and possibly superior to ramipril 5mg & 10mg in lowering mean ambulatory DBP and SBP during the last 6 hrs of the 24-hr dosing interval in mild-to-moderate hypertensives at the end of 8 and 14 week treatment phases.

Tetrahydrobiopterin (BH4) is a cofactor for the nitric oxide (NO) synthase enzymes, such that its insufficiency results in uncoupling of the enzyme, leading to release of superoxide rather than NO in disease states, including hypertension. We hypothesized that oral BH4 will reduce arterial blood pressure (BP) and improve endothelial function in hypertensive subjects. Oral BH4 was given to subjects with poorly controlled hypertension (BP >135/85 mm Hg) and weekly measurements of BP and endothelial function made. In Study 1, 5 or 10 mg kg-1 day-1 of BH4 (n=8) was administered orally for 8 weeks, and in Study 2, 200 and 400 mg of BH4 (n=16) was given in divided doses for 4 weeks

This study will examine the effects of a low carbohydrate diet versus a high carbohydrate diet on weight loss.

The purpose of this study is to test whether blood pressure control can be improved by physician education and feedback provided through the development of physician/pharmacist collaborative teams.

Evaluate the efficacy (blood pressure lowering effect) and safety of aliskiren alone and in combination with amlodipine in patients with essential hypertension.

The HYGIA study was designed to investigate prospectively the prognostic value of ambulatory blood pressure (BP) monitoring among subjects primarily evaluated at primary care settings the impact of changes in ambulatory BP during follow-up in cardiovascular, cerebrovascular, metabolic, and renal risk in hypertensive patients the influence of circadian time of treatment in cardiovascular, cerebrovascular, metabolic, and renal risk in hypertensive patients the prevalence of an altered BP profile as a function of antihypertensive treatment, circadian time of treatment, age, and presence of diabetes, among other factors.

This randomized controlled trial was designed to assess whether a community-based treatment strategy implemented by home care nurses would be effective in controlling hypertension in First Nations people with existing hypertension and type 2 diabetes.

The purpose of this study is to evaluate the effects of oral L-arginine administration on pregnant women at second trimester of gestation with chronic hypertension, respect with placebo.