Active clinical trials for "Hypertension"

Non-interventional,observational and retrospective study assessing the therapeutic and diagnostic attitude followed in primary care for a hypertensive patient depending on his degree of blood pressure control.

The investigators aim to investigate the relationship between albuminuria and arterial stiffness in diabetic patients, hypertensive patients and healthy subjects.

The purpose of this study is to describe the epidemiology of pulmonary hypertension in individuals with HIV infection and to investigate its pathogenesis. We propose to conduct a prospective observational cohort study to determine the association between highly active antiretroviral therapy (HAART) and viral suppression in HIV-infected patients who have been identified to have pre-clinical pulmonary hypertension (Aim 1). In addition, we will investigate the mechanistic role of the HIV-1 Nef protein and HHV-8 infection in the development and progression of pulmonary hypertension in individuals with HIV (Aim 2). We will also investigate endothelial function in HIV-infected patients with pulmonary hypertension (Aim 3).

Observational study of life time prognosis for persons medically treated for arterial hypertension, according to current WHO-guidelines.

The purpose of this study is to determine whether insulin resistance might affect the pathogenesis of hypertensive disorders in pregnancy since midtrimester. Furthermore, markers of vascular and placental injuries, of oxidative stress and inflammation will be evaluated.

The goal of our study is to correlate data from non-invasive tests such as perfusion lung scans with hemodynamic measurements from right heart catherizations.

This study, conducted by NIH, the University of Bamako in Mali, Africa, and Tulane University will examine the relationships between hemolysis (breakdown of red blood cells), nitric oxide (a gas important in regulating blood vessel dilation and blood flow) and pulmonary hypertension in patients with malaria. Malaria is among the leading causes of death in many of the world s poorest countries. It is caused by a parasite that is transmitted to humans by mosquitoes. Malian children ages 1-5 years are eligible for participation in this study. They include children with asymptomatic infection, uncomplicated disease, and severe disease. Uninfected controls are also included. Upon enrollment, participants have a medical history and physical examination, echocardiogram (ultrasound test of heart function) and blood tests. In addition, all participants (infected children and controls) have repeat evaluations when healthy, approximately 7 to10 days following successful therapy.

To evaluate compliance and patients' satisfaction in mono and combination treatment of Candesartan cilexetil (Atacand)/ Candesartan cilexetil 16mg, hydrochlorothiazide 12.5mg (Atacand plus) in hypertension.

In the present study, we assessed the relation between diastolic dysfunction and myocardial fibrosis in hypertensive patients without diabetes mellitus. A total of 20 medically treated ambulatory non-diabetic hypertensive patients with normal left ventricular (LV) systolic function were enrolled into this study. Myocardial fibrosis was evaluated by serum concentrations of amino-terminal propeptides of type I and III procollagen (PINP and PIIINP). All patients underwent examinations of diastolic function by echocardiography and technetium-99m (99mTc) radionuclide ventriculography. There were 8 patients with PINP ≦53 μg/l (group 1) and 12 patients with PINP >53 μg/l (group 2). Patients in group 2 had significantly lower LV peak filling rate (PFR; 3.2 ± 0.3 vs. 2.5 ± 0.2 end-diastolic volume/s) and shorter time to PFR ( 257 ± 41 vs. 174 ± 22 ms). Besides, the group 2 patients also had lower right ventricle PFR (1.9 ± 0.2 vs. 1.5 ± 0.1 end-diastolic volume/s) and shorter time to PFR ( 221 ± 29 vs. 154 ± 29 ms). Echocardiographic parameters for LV diastolic dysfunction (E/A ratio of mitral flow, deceleration time of E flow, velocities of pulmonary venous flow [retrograde A wave, systolic /diastolic velocity ratio], isovolumetric relaxation time, Tei index) were all comparable between two groups. In multiple regression analysis, LV time to peak filling rate was the only parameter that independently predicted serum PINP level (p<0.05). In conclusion, elevated serum PINP level reflected LV diastolic dysfunction in hypertensive patients without diabetes.

The purpose of this study is to determine whether frequent hypertensive urgencies increase the risk of cardiovascular events in patients with arterial hypertension.