This study is looking for volunteers that are about to be or have been treated with a Valiant Navion™ Thoracic Stent Graft System. This will be referred to as the "Stent Graft System" throughout this form. Medtronic wants to collect information about the safety and performance of this system in patients who have a dissection of the thoracic aorta.

Alzheimer's disease and Epilepsy may affect over 80% of individuals that have Down syndrome by the age of 60. Biomarkers found in the blood can enhance our understanding of the earliest changes linked to disease and may enhance clinical detection and healthy aging for individuals with Down syndrome.

The purpose of this study is to discover early neurobiological processes underlying the transition from healthy aging to disease. Our research team has developed technology that allows detection of small changes in the brain that get transferred to the blood.

We are recruiting individuals that either have or do not have Down syndrome for this biomarker study. Participants should be between the ages of 6 months and 85 years old and may include mothers and siblings of a child with Down syndrome. Infants and children will require consent form a parental or legal guardian.

Each participant will provide a blood sample for research purposes. We will also gather some basic health information about senses, habits, exercise level and smoking/vaping exposures.

In this study, we will collect congenital vascular malformation (CVM) tissue samples to examine the vascular and neurological phenotypes in the lesions. We will develop a repository of the remaining CVM samples for our future research which will substantially decrease the need for specimen collections from future CVM subjects. We will also collect blood samples and characterize proteins and RNAs profiles from serum exosomes and metabolites from CVM patients, which will help us to understand the progressive mechanism of CVM.

The purpose of the study is to generate a bio bank of specimens for research. We will tissue that would otherwise be discarded from clinical or surgical procedure and information from medical records. We will also collect discarded blood, urines and sputum. Collecting samples will help to better understanding the mechanisms of cardiovascular diseases, identify biomarkers for early diagnosis and to predict safety and efficacy of new therapies.

The purpose of this study is to evaluate the use of a non-contrast MRI for the assessment of the vasculature of the lower extremity anatomical regions. Patients eligible for this study must have been referred for a clinical contrast enhanced CT scan or an invasive catheter angiography. The overall image quality and diagnostic accuracy of the non-contrast MRI will be compared to current clinical standards of care, such as contrast enhanced MRI, CT, and invasive angiography.

This study is being conduct to assess the safety and effectiveness of a Study Sevice,GORE® EXCLUDER® Conformable AAA Endoprosthesis, in patient's with an aneurysm in their abdominal aorta. In this research study, the Study Device will be placed inside the abdominal aorta (in the approximate area of the belly button) and the Study Device will extend into both leg arteries. The Study Device will block the aneurysm (the weakened and bulging part of the artery) in the abdominal aorta from blood flow while maintaining blood flow to the arteries in the legs. Information will be collected on the performance of the Study Device for up to five (5) years.

The PREMIERS study is a proposal for conducting an adequately powered two center phase III randomized controlled trial to test whether intensive periodontal treatment reduces the risk of recurrent vascular events among ischemic stroke and TIA survivors. The study uses the resources in both states including established
dental centers, Joint Commission Certified Stroke Centers, the Schools of Public Health, and the Institute for Partnerships to Eliminate Health Disparities. The proposal addresses specific issues with regards to recruitment of African-American and rural stroke/TIA patients advocating the use of culturally appropriate strategies to educate the study subjects regarding stroke, periodontal disease and the periodontal stroke link.
The study proposes to utilize economic evaluation of the periodontal intervention from the budgetary
perspective. The focus will be on the financial sustainability of providing aggressive periodontal therapy (with
certain, although relatively low expenditures) in exchange for a reduction of uncertain recurrent vascular events
that may require high cost emergency department utilization and/or inpatient care. The sustainability of the
proposed intervention after the completion of the project is integrally linked to the health economic assessment
to show the health care cost savings. By integration with a rural primary care center, with an African American
majority and households with average incomes below the state average, the study ensures that the proposed
intervention to reduce stroke disparity is applicable to this target population.

This study is to find the best time that a follow up appointment can be scheduled to benefit the patient with liver cirrohis to return after having the bleeding vessels in the esophagus repaired by directing a scope in the esophagus and using bands to stop the bleeding.

The study will compare two durations of treatment with Octreotide in patients with confirmed esophageal variceal hemorrhage who have undergone successful endoscopy and possible endoscopic therapy for control of bleeding. All procedures including the treatment are the standard of care. Octreotide infusion and endoscopic therapy for esophageal variceal bleeding are not investigational.