Active clinical trials for "Vascular Diseases"

Background: Peripheral arterial disease (PAD) is the main cause of amputation to the lower limb within the UK, affecting over 20% of adults older than 70 years. After an amputation, individuals often use a wheelchair and do not walk with a prosthetic limb. This is due to them experiencing: older age, muscle weakness, pain, other health conditions limiting ability to exercise eg. heart problems. Healthcare professionals assess physical function with Physical Performance Based Outcome Measures (PerBOMs). A PerBOM requires an individual to complete tasks that are part of their day to day life e.g. walking or balance. PerBOMs are used with for: Setting goals with patients Assessing how patients respond to treatment/rehabilitation Predicting if patients are likely to use a prosthetic limb in the future Previous research shows most of the available PerBOMs are suitable an amputee who walks with a prosthetic limb. However, most vascular amputee patients cannot benefit from these assessments. Therefore, based on this evidence we have developed a new PerBOM to help manage vascular amputees who do not walk with a prosthetic limb. Methods: Qualitative interviews and focus groups with amputee individuals and healthcare professionals who treat them. Approaching individuals who have or will undergo an amputation to their leg due to PAD. Approaching healthcare professionals through professional networks. Interviews and focus groups will take place face to face or remotely by telephone/video conferencing, lasting approximately 1-2 hrs. In the interview or focus group, the researcher will explain and show individuals a video of the new PerBOM and explore their opinions qualitatively on this new PerBOM. All audio will be recorded, written up and analysed. All findings will be presented at scientific conferences. This study has been developed with patients and public involvement.

Increasing evidence suggests that systemic low-grade inflammation may be a driving force of cardiometabolic complications, such as vascular dysfunction, atherosclerosis and ischemic heart disease. Thus, we will investigate the role of inflammation in cardiovascular disease.

Changes in the vascular tone of anesthetized patients is common and cause hemodynamic problems. The investigators have previously demonstrated that the shape of the pulse oximetry waveform (photoplethysmography) is closely related to the changes observed in systemic vascular resistence. The main change in pulse waveform is based to the dichrotic notch position. The present study was designed to determine if the dichrotic notch position is related to a local or a systemic change in the vascular tone.

The Hamburg City Health Study (HCHS) is a large, prospective, long-term, population-based cohort study and a unique research platform and network to obtain substantial knowledge about several risk and prognostic factors in major chronic diseases.

The investigators will collect omental tissue (research surgical excision) and placental tissue (standard of care clinical delivery) from both preeclamptic and non-preeclamptic women during their c-section and use these samples to study the blood vessels, specifically the expression/activation of the AT2R.

The RECording COurses of vasculaR Diseases registry (RECCORD registry) is an observational, prospective, multicentre, all-comers registry platform. In the initial phase, patients referred for endovascular revascularization of peripheral artery disease (PAD) of the lower limbs will be prospectively included and followed up for at least one year. At baseline, data on patients' demographic characteristics, comorbidities, previous peripheral interventions, medication, and clinical stage of PAD (Rutherford category), haemodynamic parameters, and procedural data including complications will be assessed. Major adverse cardiac and limb events will be recorded at planned (at six and 12 months) and at any unplanned visits. For details see NM Malyar et al., Rationale and design of the RECording COurses of vasculaR Diseases registry (RECCORD registry). Vasa. https://doi.org/10.1024/0301-1526/a000631

The purpose of this study has evolved and expanded since its inception. Originally the intent was to establish the functional, molecular and genetic profile of fibroblasts from Fibromuscular Dysplasia (FMD) patients as compared to carefully matched control subjects. While this remains among the objectives, the study has been expanded to undertake a fully powered cross-tissue systems genetics analysis of FMD, and now also the related arteriopathies spontaneous coronary artery dissection (SCAD) and cervical artery dissection (CvAD). The overall objective is to disclose the core biologic mechanisms of these disorders.

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 investigators perform a retro-prospective exploratory cohort study among patients 65 to 85 years old with pre-operative head MRI result after thoracic surgery in Renji Hospital Affiliated to Shanghai Jiaotong University from November 2020 to December 2021. Perioperative data were collected, including preoperative general condition, laboratory examination, auxiliary examination (blood routine, blood coagulation, liver and kidney function, etc.), perioperative indicators （use of anesthetics, anesthetic time, blood pressure, etc.）, postoperative cerebral function follow-up and occurrence of cerebral vascular complications (brain infarction, brain bleed, etc.) of patients.

Porto-Sinusoidal Vascular Disorders (PSVD) is a heterogeneous clinico-pathological entity characterized by alterations in small liver vessels. "Nodular regenerative hyperplasia (NRH)" is the most common PSVD. The most frequent liver disease associated with Systemic sclerosis (SSc) is primary biliary cholangitis reported in 2 to 22% of cases. NRH prevalence estimated to 1.4%, may be underestimated as NRH diagnosis is histologic and usually suspected in case of complications due to portal hypertension. Few data are available about NRH associated with SSc resulting in a lack of knowledge of the characteristics and outcome of these patients.