View clinical trials related to Vascular Diseases.
Filter by:Diabetes has become important risk factors for threatening human life and health. Lower extremity arterial occlusive are the common complications of diabetes.Sulfur amino acid is the indispensable amino acid in mammals, and its metabolites include Taurine, Hydrogen sulfide (H2S) and sulfur dioxide (SO2). Taurine was first isolated more than 150 years ago from ox (Taurus) bile. Although the taurine can be synthesized in vivo by cysteine in the presence of cysteine dioxygenase, it is mainly acquired from dietary sources, such as eggs, meat, and seafood. H2S is a biologically relevant mediator and plays potential roles in several physiological processes and disease states in the body. H2S is synthesized from 2 sulfur-containing amino acids, l-cysteine andl-methionine, by the 3 enzymes,cystathionine-γ-lyase (CSE), cystathionine-β-synthetase(CBS), and3-mercaptopyruvate sulfurtransferase (3-MST). Previous studies have demonstrated that Taurine and H2S may play important roles in the development of the microangiopathy and lower extremity arterial occlusive.
This study evaluates whether treatment with ivabradine compared to placebo can improve exercise capacity in long-term heart transplant recipients with cardiac allograft vasculopathy and elevated heart rate at rest. Patients will receive treatment with either ivabradin or placebo for a period of 12 weeks.
Surgery performed with nerve blocks and sedation may be safer and provide better pain control compared to general anesthesia and opioid therapy in high-risk patient populations such as elderly and troubled with peripheral vascular disease, diabetes, hypertension, coronary artery disease, and chronic obstructive pulmonary disease (COPD).
Major vascular operations put the body under stress. We are trying to find out if the general health of a patient and the stress resulting from surgery can lead to the development of complications after surgery as well as increase the length of time spent in hospital. There is evidence to suggest that patients who are frail have a higher risk of developing complications after major surgery. Our aim is to ask you simple questions about your physical ability to perform daily life activities, assess your general health condition and ask you to do simple tasks such as drawing a clock or walking for a short distance to assess your speed of walking. Our main aim is to identify a tool that will assist us to identify patients who are at risk of frailty.
A retrospective and prospective registry will evaluate demographic and angiographic data in patients with spontaneous coronary artery dissection (SCAD) using medical records, invasive coronary angiography, intravascular imaging and/or computed multislice coronary tomography. The type of treatment applied during index hospitalization (i.e., clinical management, percutaneous coronary intervention or coronary artery bypass grafting) will be evaluated. Long-term follow-up (up to 10 years) will be also reported.
Background: This study is designed to provide samples to help us study the genes your blood cells are making as well as the proteins, sugars, fats, vitamins and other metabolites found in your blood or urine. Blood samples may also be collected to make special cells. These are called induced pluripotent stem cells or iPSCs. Pluripotent stem cells are cells that can be converted into any type of cell. Researchers want to study in the lab iPSCs that are derived from blood samples. Objective: To collect samples to help study genes, proteins, sugars, fats, vitamins, and other metabolites found in blood or urine. Eligibility: Healthy volunteers and patients ages 18 and older Design: First-time research study participants at NIH will have an initial visit for this study that should last no more than 1 hour. All other visits should last 20 30 minutes. Participants will undergo a limited history and physical exam. Participants may have routine blood and urine tests. If participants are giving a blood sample, they must have a hemoglobin level checked in the past 12 months to make sure it is safe for them to give a blood sample for research. Participants may have a venous blood collection. They may do this at several visits. They will lie on a recliner or couch or sit in a chair. A needle will be placed into a vein in the hand or arm, using sterile techniques. Blood will be withdrawn into multiple syringes or tubes. Participants may be asked to provide urine in an appropriate container...
To explore efficacy and safety of 0.5 mg conbercept ophthalmic injection for long-term treatment of polypoid choroidal vasculopathy (PCV) subjects.
Peripheral arterial disease can cause leg pain or discomfort (called intermittent claudication (IC)), which limits the ability to walk and carry out everyday activities. Lifestyle changes, like increasing walking, can lead to improvements, but can be a challenge to begin and then continue. The aim of this study is to investigate if a physiotherapist-led, behaviour change treatment effects walking in people with IC. The treatment is designed to build an understanding of IC and walking exercise and help individuals develop strategies to increase regular walking. The trial will recruit 192 adults (aged 50 years and over) with IC. All participants will visit King's College London or their local hospital to complete two short walking tests and answer questionnaires about their daily activities, beliefs about their symptoms and treatment, quality of life and the costs of having IC. Participants will then be randomly assigned to receive either the new treatment or continue with their usual NHS care. The new treatment involves two 60-minute face-to-face sessions (at the participant's home or local hospital) and two 20-minute telephone calls with a physiotherapist who will discuss participants' understanding and beliefs about IC, walking and help participants to set goals and plans to increase walking over 12 weeks. Participants will be provided with a step counter (pedometer) and walking record. After 12 weeks, all participants will attend a second appointment where they will repeat the walking tests and fill out another set of questionnaires. A final set of questionnaires will be completed by all participants after 6 months (by post or electronically). Some participants will be invited to provide feedback on their experience of the treatment and trial by telephone or a face-to-face interview with a researcher.
Spinal dural arteriovenous fistulas (SDAVFs) are the most common vascular disorder of the spine and account for approximately 70% of spinal vascular malformation.They are a rare pathology with an excepted incidence of only 5-10 new cases per million inhabitants per year. Most fistulas are found in the thoracolumbar region and > 80% of all SDAVFs are located between T6 and L2, whereas the cranio-cervical, cervical and sacral fistulas are more rare. SDAVFs have an overwhelmingly male predominance (80%), with an age presentation in the fifth or sixth dacede. It is presumed that SDAVFs are acquired diseases. A typical SDAVF is located inside the dural mater close to nerve root. It is fed by a radiculomeningeal artery and enters a radicular vein that merges in the perimedullary plexus. The presence of a shunt leads to a reversal of blood flow to the spinal cord venous system, which then induces venous hypertensive myelopathy.
The pulmonary vasculopathy and right heart dysfunction in COPD are drawing increasing attention these days. Recent researches show that pulmonary vasculopathy and right heart dysfunction relate to greater severity in COPD. Applying appropriate modalities for early detection of pulmonary vasculopathy and right heart dysfunction is of great importance. What's more, the interaction mechanism between pulmonary vasculature, right heart and COPD still needs to be further studied. The aim of our study is to develop an assessment system of pulmonary vasculopathy and right heart dysfunction in COPD patients and elucidate their impact on COPD course and outcome.