Active clinical trials for "Fibromuscular Dysplasia"

ARCADIA is a national registry designed to document phenotypic and genetic traits in patients with renal and/or cervical artery fibromuscular dysplasia (FMD). FMD is a group of arterial diseases that most commonly involve renal and carotid arteries. Patients with FMD may present with renovascular hypertension and/or with cerebrovascular symptoms. Angiographic classification includes the multifocal type and the focal type. FMD may affect one or more vascular beds and progress to more severe stenosis and to renal or cerebrovascular complications. FMD may be familial (OMIM #135580). Our main objective is to create a FMD registry that will collect standardized information from all consenting patients diagnosed with the condition in 16 participating centers. This registry, along with a collection of leukocyte DNA, will constitute a resource for further clinical research on FMD. The first application will be the assessment of the frequency of multi-site FMD, i.e. the frequency of cervical artery FMD in patients presenting with renal artery FMD and vice-versa. The second application will be a case-control study to identify susceptibility genes for FMD. Patients are eligible in the registry if: (a) they have renal or cervical artery FMD with either multifocal or focal lesions at CT-angiography, MR-angiography, or intra-arterial angiography; (b) they give informed consent to leukocyte DNA analysis and to the collection of bioclinical and morphologic information. Phenotypic assessment will be performed in accordance with current recommendations and best clinical practice. Given the multicenter nature of the study and the recruitment capacity of each centre, enrollment of 500 FMD cases is expected over 5 years. This number will 1) allow an accurate estimation of the frequency of multi-site FMD: when the sample size is 500, a two-sided 95% confidence interval will extend 0.035 from the observed proportion for an expected proportion of 0.20 based on a previous report and from our unpublished data. 2) In addition to a collection of 400 renal FMD already collected at HEGP, give sufficient power for a genome-wide association study seeking for susceptibility genes

Fibromuscular dysplasia is an non inflammatory non atherosclerotic obstructive arterial disease affecting mid-size arteries. It is considered as a rare vascular disease of unknown origin. Fibromuscular dysplasia may become symptomatic depending on location and severity of narrowing of the arterial lumen. for example,when a stenosis develops within a renal artery, arterial hypertension may develop. The cause of fibromuscular dysplasia is unknown. Several factors have been suggested to be associated with it: tobacco abuse or oestrogens. In order to progress into identifying possible causative mechanisms of the disease, we design a pathophysiology study destined to assess endothelial function in patients with fibromuscular dysplasia and to identify possible plasmatic biomarkers of the disease.

The researchers are trying to see whether contrast-enhanced ultrasonography, shear wave elastography, strain imaging, and 3-D volume ultrasonography improves arterial wall visualization and identifies arterial elastic properties among individuals with fibromuscular dysplasia (FMD), atherosclerosis, personal history of spontaneous coronary artery dissections (SCAD), or personal history of segmental arterial mediolysis (SAM) that may be different compared to those without the aforementioned conditions.

Ultra-high frequency ultrasound may be useful in the field of vascular research, given its ability to accurately characterize arterial wall thickness and ultrastructure. In patients with fibromuscular dysplasia (FMD), it may help identify the "triple signal" pattern in carotid arterial wall, while in Vascular Ehlers Danlos Syndrome (V-EDS) it may help to accurately measure carotid intima-media thickness, which may be extremely small and difficult to measure with standard equipment. Furthermore, novel features might be identified in small-to-medium sized arteries by ultra-high frequency ultrasound. The main aim of this study is to demonstrate that ultra-high frequency ultrasound has the same accuracy of standard ultrasound for the identification of "triple signal" in the carotid artery of FMD. Secondary aims of this study are to evaluate carotid, radial and digital intima-media thickness, wall ultrastructure and distensibility in 60 patients with FMD and in 30 patients with V-EDS.

Fibromuscular dysplasia (FMD) is localized structural defects in the arterial wall, whose innate or acquired character is still unknown. This segmental non atheromatous injury, leads to stenosis of the arteries of small and medium caliber. Renal arteries are the most commonly affected with 60-75% of total fibrodysplasia. Three histological subtypes have been described: intimal, medial and peri-medial. They are not mutually exclusive and can be observed in the same patient. This is a rare blood disease, occurring in children and young adults. In this young population with long life expectancy, these aneurysmal lesion are associated with 10% risk of rupture. To date, no data have shown in the literature that FMD is link to genetic causes, or if there is specific histopathologic lesions for non-atherosclerotic renal artery aneurysms. To answer these questions, Cardiovascular Surgery Unit of the University Hospital of Saint-Etienne, French national reference center for renal artery surgery, in association with the Reference Center for Rare Vascular Disease in Paris, designed the first study for pathological and genetic characteristics of dysplastic renal artery aneurysms in young patients.

The purpose of this project is to see if heritable alterations in the function, biology and vascular repair capacity of vascular cells make a major contribution to the burden of coronary artery disease (CAD), fibromuscular dysplasia (FMD), and other vascular diseases. In more detail, FMD is a nonatherosclerotic vascular disease that primarily affects women aged 20 to 60. It commonly affects the renal and carotid arteries but may involve almost every artery in the body. At the cellular level, FMD is characterized by increased fibroblast proliferation and collagen deposition. This study aims to define some of these cellular problems by directly studying fibroblast cells from FMD patients and healthy control subjects. Similarly, CAD is among the leading causes of death worldwide. However, a large part of the risk for CAD is unexplained. It is thought that a major but undefined risk factor may be gene (genomic) variations causing a change in vascular cell function. Here, we will study important vascular cell types in patients with severe and early onset CAD in an attempt to define these problems. Therefore, in summary, this study will look to define the various cellular-level problems that occur in patients with both in CAD and FMD. These data will be linked to DNA-level analyses to ultimately attempt to define the cause of these conditions.