Active clinical trials for "Hypertension"

Glaucoma is one of the most prevalent eye diseases and the second most common cause of blindness worldwide. The most common form is primary open angle glaucoma (POAG). Glaucoma is a slowly progressing neuropathy of the optic nerve that causes loss of visual field and eventually blindness. Elevated intra-ocular pressure (IOP) is the most important risk factor. Corticosteroids, which are often used for the treatment of many diseases in ophthalmology and other specialities, may cause an elevation of the IOP. It is estimated that corticosteroids induce ocular hypertension in approximately 18%-36% of the general population and in patients with POAG this percentage can be as high as 92%. When the treatment is sustained, this can cause a glaucomatous neuropathy of the optic nerve (corticosteroid-induced glaucoma). The precise pathogenic mechanism isn't clear yet. Genetic factors are likely to affect the susceptibility to corticosteroid response. Therefore, an overview of the genetic mechanisms of corticosteroid-induced glaucoma can give more insight in the pathogenesis. In this study the researchers investigate the occurrence of SNPs (single nucleotide polymorphisms) in 150 cases with a steroid-response in comparison with 300 controls exposed to corticosteroids without a steroid-response. Up to now, one small GWAS has been conducted comparing 32 patients with and without corticosteroid-induced ocular hypertension after treatment with intravitreal triamcinolone. In this study, two SNPs proximal of the transcriptional start site (near the 5') of HCG22 on chromosome 6 were identified. However, this is a rather small sample population and the investigators didn't match for the underlying disease. Further, in another small study, Hogewind et al. performed SNP analysis in multiple genes (SFRS3, FKBP4, FKBP5, and NR3C1) in corticosteroid-induced ocular hypertension. This study enables the investigators to identify patients at risk for developing corticosteroid-induced glaucoma and to gain a better insight in the pathogenesis. This may also lead to the discovery of biomarkers that indicate an increased risk of developing a steroid-induced glaucoma and new prevention and treatment strategies, which are necessary as the treatment of corticosteroid induced-glaucoma now only focuses at lowering the IOP and can still be challenging.

To investigate the prevalence of primary aldosteronism (PA) in Chinese patients with newly diagnosed hypertension.

Blood pressure variability (BPV) is being increasingly recognized as an important influence on hypertension outcomes as well as a risk factor for other cardiovascular (CV) events. However, in Asia there is a current lack of awareness of BPV and its significance on patient outcomes. Furthermore, there is ongoing debate on the role of home blood pressure (HBP) monitoring in managing hypertension patients and uncertainty on how best to integrate it into clinical practice. Therefore, we conduct Asia BP@Home study to assess HBP control status in each Asian country and develop an Asian consensus and Asia-specific treatment for hypertension.

This is an observational prospective study of azilsartan medoxomil / chlorthalidone compared with irbesartan / hydrochlorothiazide in routine therapy of patients with arterial hypertension and obesity.

Longitudinal clinical observation of optic nerve head, using slit lamp fundoscopy, guides therapy in pediatric idiopathic intracranial hypertension (IIH) patients; however, it remains a limited method of producing quantitative data in evaluating in patients with IIH. In this study we intend to compare, by using spectral domain optical coherence tomography (OCT), the mean retinal nerve fiber layer thickness and total retinal thickness (RNFLT/TRT) of the optic nerve of newly diagnosed IIH children to a control group. This will provide a quantitative measure for follow-up and treatment of this patient group.

The New International CTEPH Database is a prospective, observational multi-center disease registry run by the International CTEPH Association (ICA), which will collect data in chronic thromboembolic pulmonary hypertension (CTEPH) patients worldwide. The registry will run for approximately 5 years. Its objective is to provide an overview on epidemiology of CTEPH, mode of diagnosis and treatment approaches worldwide as well as determinants of long-term outcomes as measured by New York Heart Association (NYHA) functional class and survival. The data collected will improve the knowledge and understanding of this condition, support the further development of diagnosis and treatment guidelines for patients with CTEPH, and contribute to improving patient care in the long-term.

Prospective, monocentric study for the evaluation of latent pulmonary arterial hypertension in patients with congenital shunt lesions lost to follow-up. Lost to follow-up is defined as latest clinical control ≥ 5 years.

The purpose of this study is to determine the prognostic value of echocardiographic parameters in comparison with clinical and hemodynamic parameters in pulmonary arterial hypertension (PAH). A secondary purpose of this study is to analyze the disease evolution after 3 to 6 months. In pulmonary fibrosis it has been demonstrated that the variation of clinical and paraclinical parameters between 2 examinations has a prognostic interest. In this study the prognostic value of variation of some echocardiographic parameters between initial examination and echocardiography after 3 or 6 months will be evaluated. Another secondary purpose is to create a common database for Pneumology, Cardiology and Epidemiology departments with prospective registration of new cases of PAH and follow of patients under treatment.

The investigators aim to evaluate the utility of portal vein pulsatility as a predictor of the composite outcome of persistent organ dysfunction plus death in patients undergoing elective or urgent pulmonary endarterectomy for thromboembolic pulmonary hypertension. The investigators' hypothesis is that the portal vein pulsatility fraction, measured using transesophageal echocardiography immediately after weaning of cardiopulmonary bypass, is proportional to the risk of developing subsequent end-organ dysfunction in the postoperative setting.

GlaxoSmithKline (GSK) is embarking on a clinical program to assess the treatment of PAH with an Angiotensin converting enzyme 2 (ACE2). This new treatment may require subcutaneous administration, in comparison to current treatments which are taken orally. Hence, GSK would like to conduct this qualitative interview study with PAH subjects to explore subject's perspective and preferences for various modes of treatment administration (daily or weekly subcutaneous injection versus current treatment options). This will be a qualitative study comprising the conduct of semi-structured telephone concept elicitation interviews with 8 to 10 PAH subjects (each approximately 30 minutes in duration) in the United States (US).