Active clinical trials for "Hypertension"

To test the hypothesis that lowering serum uric acid will ameliorate hypertension in children after renal transplantation.

Various guidelines recommended angiotensin converting enzyme (ACE) inhibitors or angiotensin Ⅱ receptor-1 blockers (ARBs) for hypertensive patients with diabetes on the basis of the cardiac- and reno-protective effects of these drugs. However, these recommendations could not be extrapolated to Japanese patients, because Japan has been known as a country with a low incidence of coronary artery disease and a high incidence of cerebrovascular disease. Furthermore, calcium channel blockers (CCBs) also were protective against renal function as well as ACE inhibitors in Japanese diabetic hypertensive patients. This study will test whether ARBs or CCBs are superior in treating Japanese diabetic hypertensive patients.

This study will examine and test healthy volunteers and patients with pulmonary hypertension to try to learn more about the disease and find better ways to detect, treat, and, if possible, slow progression. Pulmonary hypertension is a rare blood vessel disorder of the lung in which the pressure in the pulmonary artery (the blood vessel that leads from the heart to the lungs) rises above normal levels and may become life-threatening. Normal volunteers and patients with pulmonary hypertension 18 years of age and older may be eligible for this study. All candidates are screened with a review of their medical records. Normal volunteers also have a medical history, electrocardiogram, echocardiogram (heart ultrasound), and pulmonary function test, in which the subject breathes in and out of a tube that measures lung volume, mechanics and function. All participants undergo the following tests and procedures: Echocardiogram to measure heart function and blood pressure in the lungs. A small probe held against the chest uses sound waves to obtain pictures of the heart. Magnetic resonance imaging (MRI) to evaluate the heart's pumping action. Subjects lie on a stretcher that slides into a long, tube-shaped scanner. The machine uses a magnetic field and radio waves to obtain images of the heart. 6-minute walk to measure how far the subject can walk in 6 minutes. Subjects walk around the hospital for 6 minutes at a comfortable pace. Exercise testing to measure the ability to exercise and the subject's oxygen levels during exercise. Subjects exercise on a bike or treadmill while the oxygen and carbon dioxide they breathe are measured using a small device placed in the mouth. Right heart catheterization to measure pressure in the heart and lungs. A small catheter (plastic tube) is placed in an arm vein. A longer catheter called a central line is placed in a deeper vein in the neck or just below the neck, or in the leg or arm. A long, thin catheter that measures blood pressure directly is then inserted into the vein and advanced through the chambers of the heart into the lung artery to measure all the pressures in the heart and obtain blood samples. Genetic and protein studies. DNA, RNA, and proteins from blood samples are studied for genes and proteins that might predict the development or progression of pulmonary hypertension. In addition to the above, patients whose pulmonary hypertension was caused by a blood vessel injury undergo the tests described below. The right heart catheter inserted for the catheterization procedure remains in place to obtain measurements of the effects of nitric oxide and nitrite in the following procedures: Inhalation of nitric oxide (a gas naturally produced by cells lining arteries) at 30-minute intervals to examine its effect on lung and heart pressures. Inhalation of aerosolized nitrite at 5-minute intervals to measure its effects on lung and heart pressures. Inhalation of nitric oxide for up to 24 hours to obtain multiple measurements of its effect on lung and heart pressures. Blood draws for laboratory tests. In patients whose pulmonary hypertension was caused by a blood vessel injury, we also plan to follow response to standard therapy. After the initiation of standard therapy, we will restudy the same parameters (excluding NO and sodium nitrite studies) in these patients at approximately 4 months, and yearly for 5 years

Candesartan is effective in preventing cardiovascular events in patients without restenosis after coronary angioplasty. Therefore, the investigators hypothesized that candesartan after drug-eluting stent (DES) implantation was also effective in preventing cardiovascular events. The purpose of this study is to investigate whether an angiotensin II receptor blocker, candesartan, is effective in reducing the incidence of cardiovascular events after drug-eluting stent implantation.

The long-term objective is to determine whether better adherence to prescribed medications can be achieved through positive affect induction and self-affirmation leading to reduction in hypertension-related outcomes such as end-stage renal disease, stroke, and cardiovascular mortality among African American patients with poorly controlled hypertension.

To determine if nonpharmacological interventions, including diet and lifestyle change, could prevent increases in arterial blood pressure leading to systemic hypertension.

To study antihypertensive efficacy of 12 weeks of Losartan based therapy Resilo (Losartan) and Resilo-H (Losartan+ Hydrochlorothiazide) in uncontrolled hypertensive and diabetic hypertensive patients.

This study will test if a study drug (CS-3150) will affect the heart rate in healthy males and females. Two doses of the study drug will be tested. Heart rate is not expected to be different between the study groups.

Hypertension is the leading risk factor for cardiovascular disease, global mortality, and ranks third among the causes of disability. Treatment of hypertension is relatively straightforward, but patient adherence to long-term self-care strategies is problematically low. Three important behaviors that individuals can adhere to in order to help lower their BP are 1) Taking medications as prescribed by a physician, 2) Monitoring BP at home, and 3) Limiting dietary sodium intake. Adherence to these behaviors is problematic and currently ranges from 25% to 50%; the present Phase I STTR study is aimed at addressing the behavioral barriers for adherence to these three activities with the help of mobile technology. In particular, this STTR will develop and test an incentive program delivered through a mobile health app to increase adherence to prescribed BP control regimens and precipitate reduction in BP.

The primary purpose of this study is to identify and develop biomarker signatures based on circulating micro ribonucleic acid (RNA) in the blood samples associated with high risk of pulmonary hypertension (PH) to assist in the diagnosis of PH; to estimate the sensitivity, specificity, positive predictive value, and negative predictive value of the biomarker signatures in identifying participants with PH by comparing the biomarker signatures to right heart catheterization (RHC) and to compare the sensitivity, specificity, positive predictive value, and negative predictive value of the biomarker signatures with the sensitivity, specificity, positive predictive value, and negative predictive value of transthoracic echocardiogram (TTE) in identifying participants with PH documented by RHC.