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Heart Catheterization Using Magnetic Resonance Imaging (MRI) Fluoroscopy and Passive Guidewires
Background: A heart catheterization is a diagnostic heart procedure used to measure pressures and take pictures of the blood flow through the heart chambers. Magnetic resonance imaging (MRI) fluoroscopy shows continuous pictures of the heart chambers that doctors can watch while they work. Researchers want to test this procedure with catheterization tools routinely used in x-ray catheterization called guidewires. Guidewires will help move the heart catheter through the different heart chambers. Guidewires are usually considered unsafe during MRI because MRI can cause a guidewire to heat while inside the blood vessels and heart....
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Hemodynamic Effects During Exercise in Patients With Pulmonary Hypertension Receiving Sildenafil
To study hemodynamic effects of Sildenafil during exercise in patients with pulmonary hypertension.
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Hemodynamic Effects of BPA at Rest and During Exercise in CTEPH
Chronic thromboembolic pulmonary hypertension (CTEPH) is characterized by obstruction of the pulmonary vasculature by residual organized thrombi, leading to increased pulmonary vascular resistance (PVR), progressive pulmonary hypertension, and right heart failure. Medical therapy and balloon angioplasty (BPA) are effective treatment alternatives in lowering pulmonary pressures and increasing pulmonary flow. The aim of this study is to assess the hemodynamic effects of BPA or medical therapy on the pressure-flow relationship in the pulmonary vasculature and the pulmonary vascular compliance.
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Hemodynamic Effects of Normobaric Hypoxia During Exercise in Patients With Pulmonary Hypertension
To study hemodynamic effects of acute normobaric hypoxia during exercise in patients with pulmonary hypertension in a single-center randomized controlled trial.
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Hemodynamic Testing Strategies to Assess Pulmonary Hypertension in Heart Failure
The goal of this observational study is to learn about heart function and high lung blood pressure in patients with heart failure. The main question[s] it aims to answer are whether we can improve the ability to predict patients who will have complications after they receive treatment including heart transplant and left ventricular assist devices.
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Hormonal, Metabolic, and Signaling Interactions in PAH
Our hypothesis is that optimal treatment of the dysfunctional metabolic pathways which underlie PAH will improve pulmonary vascular function and consequences of the disease.
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HRV as a Marker of Treatment Response in PAH Arterial Hypertension
This is a prospective longitudinal cohort study to determine the value of HRV obtained using noninvasive actigraphy to quantify the response to pulmonary vasodilator therapy in newly diagnosed PAH patients
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Hyperpolarized 129Xe MR Imaging of Lung Function in Healthy Volunteers and Subjects With Pulmonary Disease
The purpose of this study is to develop and evaluate the usefulness of hyperpolarized (HP) 129Xe gas MRI for regional assessment of pulmonary function.
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Identification of Heritable CTEPH
Some patients who have blood clots come down with a life-threatening condition known as Chronic Thromboembolic Pulmonary Hypertension (CTEPH), which is high blood pressure only in the arteries of the lungs. This study seeks to understand more about the genetics causes of CTEPH by obtaining blood samples and examining family histories.
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Impedancemetry in Patients Monitored for Pulmonary Hypertension
Monocentric cohort study, prospective, evaluating the variability of cardiac output measurement by resting and stress impedancemetry as a prognostic factor for Pulmonary Hypertension
Clinical TrialsJames Wetherill2020-12-18T13:53:16-05:00
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