Active clinical trials for "Hypertension"

The investigators intend to evaluate the function of left heart and right heart and the motion balance between four chambers of the heart by speckle tracking technique during the follow-up of patients with pulmonary hypertension, and explore the relationship between the balance and prognosis of patients.

Hypertension is the most important risk factor for cardiovascular and cerebrovascular diseases，and also a substantial public health problem. The purpose of the study is to investigate the association between plasma biomarkers and adverse outcomes in patients with hypertension.

Pulmonary Arterial Hypertension (PAH) is a chronic disease characterized by a progressive increase in pulmonary vascular resistance (PVR), which leads to right ventricular (RV) failure, and ultimately death. Different studies have outlined how various factors as vascular resistance, functional class, age, correlate with mortality. However, the modality of death and risk factors for mortality in patients with PAH are little known. For this purpose, more studies are necessary to analyze the risk factors related to modality of death in PAH.

Despite a rapidly increasing number of renal denervation (RDN) procedures, only little is known regarding the patient or procedural characteristics influencing the outcome. None of the detectable variables like number of ablation points, temperature rise, impedance drop, have been shown to correlate with the blood pressure (BP) reduction. In this study, the investigators assess different patient and procedural characteristics, like exact patient medication, stress hormones, heart rate variability, and focus on the change of the catecholamine spill-over, and the impact on BP and heart rate after RDN and after EP ablation. The investigators hypothesize the correlation between reduction of catecholamine spill-over due to denervation and the BP reduction. In this study, the investigators will assess 40 patients undergoing RDN and 40 patients undergoing EP ablation.

The purpose of this study is to investigate whether exposure to hypertensive disorders of pregnancy and/or a preterm birth results in alterations in the cardiovascular system during infancy.

The aim of this study is to evaluate nocturnal hypertension with 24-hour ambulatory blood pressure and home blood pressure (BP) measurements through a) comparison of mean BP and nocturnal dipping assessed with the two methods, b) correlation of those parameters with parameters of target-organ damage and c) comparison of the potential of the two methods to define non-dippers.

This is a retrospective data analysis of patients with high blood pressure (hypertension) who took metoprolol for a minimum of 6 months who then switched to taking nebivolol for a minimum of 6 month to treat hypertension. These patients will be identified from a large medical claims database. This study tests the hypothesis (alternative, higher or lower) that average patient monthly health care administrative cost changes after switching from metoprolol to nebivolol.

The study in aimed to investigate epidemiology of risk factors in Russian Federation its prognostic value aimed on acceptance of national specific definition of metabolic syndrome and guidelines for its management.

This is a multi-site prospective epidemiological investigation of cardiovascular disease (CVD) among Abuja residents from the rural and metropolitan area.

Many authors link tinnitus to arterial hypertension. The aim of this study is to establish a possible relationship between them, analyze the severity of tinnitus related to arterial hypertension and analyze a possible influence of ototoxic drugs used to treat arterial hypertension