View clinical trials related to Ischemia.
Filter by:This prospective non-interventional cohort study investigates the pathophysiology of Atrial Fibrillation Detected After Stroke or transient ischemic attack (AFDAS) by comparing the autonomic function and inflammation between patients with AFDAS, patients with atrial fibrillation (AF) diagnosed before the ischemic event or known AF (KAF), and patients with normal sinus rhythm (NSR) after 14 day of cardiac monitoring following the event onset.
We propose a single-scan two-injection myocardial perfusion imaging protocol using ammonia. Subjects will undergo single-scan two-injection imaging as well as regular stress single-scan single-injection protocol and the myocardial blood flow of both techniques will be compared.
The purpose of this study is to collect data to determine if the medication, Ranolazine, effects heart muscle function in patients who have areas of non-revascularizable heart muscle.
Objective: Referring The relation between CEA(Carotid endarterectomy) postoperative blood flow monitoring and blood pressure, and combining patient demographics and preoperative risk factors to establish an applicable individual blood pressure controlling model. By comparing with routine antihypertensive strategies through prospective randomized controlled trials , to provide the best perioperative blood pressure control standards and strategies for each patient ,thus better ensuring the safety and efficacy of CEA .
Elective percutaneous coronary intervention (PCI) is often associated with myocardial necrosis evidenced by peri-procedural troponin release. This is a surrogate for subsequent cardiovascular events. There is no study on the effect of peri-PCI oxygenation in in myocardial protection and cardiopulmonary fitness outcome. Patients with higher baseline cardiopulmonary fitness will have lower mortality. This study is to assess the utility of oxygen to reduce ischaemia in patients with significant stable coronary artery disease scheduled for elective PCI. The secondary objective is to evaluate further effect of peri- PCI oxygenation on cardiovascular fitness and autonomic response.
This is a randomized, double-blind, placebo-controlled parallel group outpatient 42-day treatment study that will utilize standard stroke rehabilitation outcome measures to evaluate the effect of DNS-3379 on upper extremity motor recovery in subjects following ischemic stroke.
Background: CCTA is a common way to evaluate coronary artery disease. It stands for coronary computed tomography angiography. It uses scanning to look at the arteries that supply blood to the heart. It is noninvasive, widely available, and generally accurate. But it does expose people to radiation. Exposure to high amounts of radiation can increase a person s risk of getting cancer. Researchers want to learn more about the relationship between CCTA and radiation exposure. Objective: To see how much radiation is used to take pictures of the heart and how measures to reduce radiation are used around the world. Eligibility: People ages 18 years and older who need a computed tomography (CT) scan of the heart Design: Participants will be screened with a review of their medical records. Participants may have a pregnancy test. Participants will have the scheduled scan. Small, sticky discs will be placed on the chest. A small tube will be placed into a vein in the arm. A contrast material (dye) will be given through it. Participants will lie on the CT scanning table. A CCTA scan usually takes about 15 minutes if the heart rate is slow and steady.
In this pilot clinical study the investigators propose to conduct a prospective, randomized, double-blinded, placebo-controlled clinical trial for 30 days for participants with critical limb ischemia (CLI) who undergo a major (above-knee or below-knee) lower extremity amputation. By exploring the primary endpoints we aim to determine whether NAC can affect amputation stump perfusion and healing. Based on preclinical data, the investigators hypothesize that NAC will augment both amputation stump perfusion as well as healing. The investigators will utilize the data from this trial to determine the true effect size that is necessary for a larger clinical trial to determine the clinical efficacy of NAC is healing surgical sites such as major lower extremity amputation stumps.
This study is designed as a prospective observational feasibility study. The investigators will study whether vulnerable plaques on OCT (fibrous cap ≤ 70 μm) show a locally increased uptake of 18F-choline on PET-MRI compared to stable plaques and whether the culprit plaque shows a locally increased uptake of 18F-choline on PET-MRI compared to non-culprit plaques. First, 15 NSTEMI or STEMI patients who underwent urgent percutaneous coronary intervention (PCI) of the culprit vessel, who are diagnosed with multivessel coronary disease and are currently scheduled for a second PCI at the VieCuri hospital will be included. These patients will be subjected to an additional 18F-choline PET-MRI examination at the MUMC+ and an additional optical coherence tomography (OCT) examination (during the PCI procedure at the Viecuri hospital). OCT will be performed as a reference standard to validate 18F-choline PET-MRI for detection of vulnerable plaques in the coronary arteries. In addition, 15 NSTEMI patients, who are scheduled for PCI of the culprit lesion at the MUMC+, will be subjected to an additional 18F-choline PET-MRI examination at the MUMC+. Hereby, the culprit coronary vessel and thereby the culprit plaque can be identified by the location of the myocardial infarct, as identified by late enhanced MRI. The investigators will study whether the culprit plaque shows an increased 18F-choline uptake on 18F-choline PET-MRI compared to non-culprit plaques in the other coronary arteries. All patients will receive standard, guideline-based clinical care, while PET-MRI and OCT will be performed as additional measurements. Before the start of the study, 5 stable angina pectoris patients that are scheduled for a PCI procedure at the MUMC+ will be included at the MUMC+ for a single PET-MRI scan to optimize the parameters of the coronary PET-MRI scan.
The aim of this study is to assess microvascular function as determined by a cardiovascular magnetic resonance measurement of whole-heart (global) perfusion reserve. The goal is to determine the prevalence of MVD in two common forms of non-ischemic cardiomyopathy, hypertrophic cardiomyopathy (HCM) and idiopathic dilated cardiomyopathy (IDCM). The hypothesis that an optimized technique will provide robust detection of MVD and that a multifaceted approach will provide new insights into the pathophysiology of MVD, including the influence of myocardial scarring upon the presence and severity of MVD.