View clinical trials related to Pulmonary Hypertension.
Filter by:Doppler signals can be recorded from the lung parenchyma by means of a pulsed Doppler ultrasound system incorporating a special signal processing package; i.e. the transthoracic parametric Doppler (TPD) (EchoSense Ltd., Haifa, Israel). Systemic sclerosis patients often develop pulmonary vascular disease leading to pulmonary hypertension. The TPD system may provide important insight into pulmonary blood vessels characteristics by the LDS signals that are related to pulmonary hypertension. The TPD performance in detecting PAH in SSc patients will be assessed in the study.
Right ventricular (RV) failure is the leading cause of death in pulmonary arterial hypertension. (PAH) Right ventricular ejection fraction is one of the most important predictors of prognosis in heart failure patients regardless of cause. It is estimated that 30-50% of patients with heart failure and preserved ejection fraction (HFpEF) have right ventricular dysfunction and up to 70% of these patients will have significant pulmonary hypertension (PH), both of which are related to much worse prognosis. Right ventricular failure is becoming an increasingly prevalent and significant cause of morbidity in patients with left heart disease. Despite the significance of RV function to survival, there are no therapies available that directly or selectively improve RV function. The overall theme of this research project is to evaluate the mechanisms that contribute to the cause of right heart failure. This small study is designed to look at the role of heart and lung metabolism and pulmonary hypertension as they relate to the development of right heart failure in cardiovascular disease.(PH-LHD)
The purpose of this study is to see if Regadenoson may offer improved ease of use, single dose administration, and better tolerance for testing for pulmonary hypertension than iNO. You will be screened to make sure Regadenoson is safe for you with a clinical evaluation, blood tests, and an ECG.
Acute secondary pulmonary hypertension (PH) often leads to dysfunction of the right ventricle (RV) and can be a significant cause of patient morbidity and mortality. Selective pulmonary vasodilation with inhaled nitric oxide (INO) has become the treatment of choice for this condition. The evidence supporting INO safety and efficacy under these circumstances is sparse, however, and is largely extrapolated from the use of INO in neonatal pulmonary hypertension. Moreover, the high cost and potential toxicity of INO makes the therapy far from ideal. Emerging evidence suggests that inhaled aerosolized prostacyclins such as iloprost may be a favorable alternative therapy.
Estimate the effect of chronic beta-adrenergic receptor blockade with carvedilol on RV function in patients with PAH. Assess the safety and tolerability of chronic carvedilol therapy in patients with PAH
This study will assess multiple doses of MK-8892 administered to participants with pulmonary hypertension "out of proportion" (PHOOP) and heart failure with reduced left ventricular ejection fraction (rEF). It is hypothesized that generally safe and well tolerated multiple doses of MK-8892 will achieve a true reduction from baseline in pulmonary vascular resistance (PVR) greater than 12%. Sixteen participants with PHOOP/rEF were to receive multiple doses of MK-8892 titrated to the highest tolerated dose for each participant (up to 4 mg daily), and to undergo evaluation for safety and systemic hemodynamics and cardiac function. Only 4 participants were enrolled and completed the study due to a strategic business decision by the sponsor to terminate the clinical conduct of all MK-8892 ongoing trials including this trial.
Heart failure with preserved ejection fraction (HFpEF), is one of the leading causes of pulmonary hypertension (PH). Despite the severity of this disease, no established treatments exist for this class of PH. Nebivolol is a drug used in high blood pressure and heart failure, but not used in patients with PH. Due to some additional properties it possesses, the investigators believe nebivolol will improve disease severity in patients with PH associated with HFpEF. The hypothesis of this research study is that nebivolol improves PH severity in patients with HFpEF, as measured by hemodynamic and clinical parameters.
Transfusion of stored blood has been associated with increased pulmonary vascular resistance in lambs. The investigators hypothesize that transfusion of one unit of red blood cells stored under standard conditions in intensive care patients will increase pulmonary arterial pressure and pulmonary vascular resistance to a greater extent than will one unit of fresh red blood cells.
Recently it has been shown that clear reproducible Doppler signals can be recorded from the lung parenchyma by means of a pulsed Doppler ultrasound system incorporating a special signal processing package parametric Doppler, TPD, EchoSense Ltd., Haifa, Israel). These lung Doppler signals (LDS) are in full synchrony with the cardiac cycle and can be obtained from the lungs, including areas remote from the heart and main pulmonary vessels. The LDS waves typically have peak velocities of up to 30 cm/s and are of relatively high power, making it possible to detect them despite the aforementioned attenuation by the air in the lungs. The LDS are thought to represent the radial wall movement of small pulmonary blood vessels, caused by pressure pulse waves of cardiac origin which propagate throughout the lung vasculature. The LDS may contain information of significant diagnostic and physiological value regarding the pulmonary parenchyma and vasculature, as well as the cardio-vascular system in general. Pulmonary arterial hypertension (PAH) is a condition characterized by reshaping of the small pulmonary arteries with increase in pulmonary vascular resistance, leading gradually to right-sided cardiac failure. A trans-thoracic echocardiograph (TTE) is a test classically undertaken in order to screen for pulmonary hypertension. However, the systolic pulmonary artery pressure (SPAP) values thereby obtained are often imprecise and depend upon the expertise of the individual carrying out the test. Therefore, the pulmonary arterial pressure and cardiac output values have to be ascertained with a right-sided cardiac catheterization, which is considered the gold-standard, but is invasive. In a pilot study of adult PAH patients (unpublished), lung Doppler signals have been shown to have the potential to diagnose pulmonary hypertension in two different ways: First, by measuring the degree of attenuation of the LDS during acute pressure rise in the chest cavity (i.e. during Valsalva maneuver). Second, by detecting differences between the LDS in patients with PAH and control subjects. One of the objectives of the present study is to evaluate the lung Doppler signals in pediatric patients of various age groups, with and without pulmonary vascular disease. The second objective of the study is to verify previous findings of abnormal lung Doppler signals in adult patients with pulmonary hypertension.
This study is a multi-center, prospective, randomized, double blind, placebo-controlled clinical trial. Subjects in the study will be adults with New York Heart Association (NYHA) Class II-IV heart failure (HF) due to left ventricular systolic dysfunction (LVSD), left ventricular ejection fraction (LVEF) <0.40, and secondary pulmonary hypertension (PH). The purpose of the study is to evaluate the safety, effectiveness, and effects of tadalafil compared to placebo on the subjects' functional capacity / quality of life.