View clinical trials related to Foramen Ovale, Patent.
Filter by:A single-arm, non-randomized, multi-center clinical study of the Amplatzer™ Trevisio™ Intravascular Delivery System for facilitating percutaneous, transcatheter implantation of the Amplatzer™ Occluder Devices. NOTE: The enrollment for the VSD cohort is still recruiting (3 subjects at this moment); therefore, the overall status of the study is Recruiting.
The purpose of DEFENSE-ELDERLY is to identify the prevalence of AF and evaluate the clinical impact of AF in elderly ESUS patients and no other known sources of stroke besides a high-risk patent foramen ovale, and compare it with elderly ESUS patients without high-risk PFO (no PFO or non-high risk PFOs)
This study will assess the safety and effectiveness of GORE® CARDIOFORM Septal Occluder in a post approval setting and evaluate the quality of operator education and training and transferability of trial experience to a post-market setting.
The purpose of this single arm, multi-center study is to confirm the safety and effectiveness of the AMPLATZER™ PFO Occluder in the post Approval Setting.
The foramen ovale, a kind of physiologic channel in the interatrial septum in the heart at embryonic stage, is closed normally at 5-7 months after birth. When it is not closed, it is referred to as the patent foramen ovale (PFO), which is found in approximately 1/4 of general population. It was shown in the studies in recent years that the risks of cryptogenic stroke, migraine, peripheral arterial embolism and decompression sickness in the patients with PFO were several times higher than those in healthy people. Therefore, PFO, previously considered a condition without the necessity of treatment, causes the attention of many experts and scholars around the world. Migraine with or without aura is defined as one of the most disabling chronic diseases, since according to WHO, the disability adjusted life year caused by migraine was second only to that by non-fatal stroke in 2005. In recent years, an increasing number of researches suggested that migraine is closely related to the right-to-left shunt (RLS) in the heart. And PFO is clinically considered as the most common cause of RLS. The closure treatment for PFO-induced migraine has been gradually applied in several hospitals in China. The relationship of PFO with migraine, however, was not evaluated systematically based on specific standards, unfortunately leading to non-inclusion of many high-risk patients with PFO in the evaluation. The following aspects are to be fully recognized: the selecting and screening procedures for the high-risk population with PFO-induced migraine; the indications and standards of closure treatment for PFO in the patients with PFO-induced migraine; and the possibility that the made-in-China occluders substitute for those imported in the prevention from migraine. Furthermore, there is still a lack of prospective, multi-center, randomized and controlled studies in this subject, and standard or normal screening and treatment procedures have not yet been established in China. From this point, the investigators developed the Chinese people-specific procedures and standards of diagnosis of PFO-induced migraine in this study, based on current standards and methods of diagnosis, treatment and prevention of PFO-induced migraine in foreign countries. And the investigators prospectively adopted continuous inclusion of the high-risk patients with PFO-induced migraine, who were randomly divided into the closure treatment (transcatheter closure of PFO) group and the medication (drugs administered alone) group at the ratio of 1:1., in order to evaluate if the interventional treatment is better than the medication alone in these patients, to assess the efficacy and safety of the made-in-China occluders in the interventional treatment and prevention of PFO-induced migraine, and to identify the incidence of PFO in the patients with migraine in China and develop the Chinese people-specific screening protocols of PFO-induced migraine.
The aim of this study is to determine whether three-dimensional tranesophageal echocardiography (3D TEE) assessment of ostium secundum atrial septal defect (ASD II) may be as efficient as two-dimensional (2D) TEE assessment complemented by the balloon-sizing during transcatheter closure of the defect.
BACKGROUND: In industrialized countries a considerable and increasing proportion of strokes occur at younger ages. Stroke at young age causes marked disability at worst and thus long-standing socioeconomic consequences and exposes survivors for 4-fold risk of premature death compared with background population. Up to 50% of young patients with ischemic stroke remain without definitive etiology for their disease despite extensive modern diagnostic work-up (i.e. cryptogenic stroke). The group of cryptogenic strokes includes those with patent foramen ovale (PFO) or other abnormalities in the atrial septum in the heart as the only or concomitant finding. Population prevalence of PFO is high, 25%, and the mechanisms how PFO would be associated causally with ischemic stroke remain to be clarified. Moreover, there are only scarce data on clinical outcome, long-term risk of new vascular events, and prevention of such events in these patients. DESIGN: Searching for Explanations for Cryptogenic Stroke in the Young: Revealing the Etiology, Triggers, and Outcome (SECRETO) is an international prospective multicenter case-control study of young adults (age 18-49) presenting with an imaging-positive first-ever ischemic stroke of undetermined etiology (aim N=2000). Patients are included after standardized diagnostic procedures (brain MRI, imaging of intracranial and extracranial vessels, cardiac imaging, and screening for coagulopathies) and age- and sex-matched to healthy controls in a 1:1 fashion. Up to 45 study sites worldwide will be needed to recruit the planned participant population during a 3-year period. Neurovascular imaging and echocardiography studies, and ECGs will be read centrally. AIMS: SECRETO involves five principal fields of investigation: (1) Stroke triggers and clinical risk factors; (2) Long-term prognosis (new vascular events, functional and psychosocial outcomes); (3) Abnormalities of thrombosis and hemostasis; (4) Biomarkers of e.g. inflammation, atherogenesis, endothelial function, thrombosis, platelet activation, and hemodynamic stress to characterize postulated cryptogenic stroke mechanisms; and (5) genetic study, including genome-wide association and candidate gene studies as well as next-generation sequencing approach. All analyses consider cardiac functional and interatrial structural properties as a possible mediator. Furthermore, SECRETO Family Study (substudy) aims at collecting extensive family history of thrombotic events from informative patients being screened for SECRETO main study and collect genetic samples from all consenting family members for whole-genome sequencing. SIGNIFICANCE: SECRETO will provide novel information on clinical and subclinical risk factors, both transient and chronic, predisposing to cryptogenic ischemic stroke in young adults. This study also reveals long-term prognosis of this understudied patient population and may discover new genetic background underlying the disease mechanism and provide potential targets for drug development.
Background and hypothesis: The appropriate treatment strategy for secondary stroke prevention in patients with cryptogenic stroke and patent foramen ovale (PFO) remains challenging. Clinical and anatomical variables reported to be risk factors associated with stroke recurrence include older age, large PFO, large right-to-left shunting, and combined atrial septal aneurysm (ASA), which, however, were not confirmed by other studies. The investigators hypothesized that percutaneous closure of PFO could be an effective option for secondary prevention in cryptogenic stroke patients with high-risk PFO. Trial Objective: The primary objective of this study is to assess whether percutaneous device closure of PFO is superior to conventional antithrombotic treatment in preventing stroke recurrence in the cryptogenic stroke patients with high-risk PFO.
The objective of this study is to determine the safety, performance, and effectiveness of the SeptRx IPO PFO Closure System in the treatment of Patent Foramen Ovale (PFO) in patients who are amenable to percutaneous closure of their PFO defects.
Following a cryptogenic stroke, many patients are nowadays treated with the percutaneous closure of a patent foramen ovale (PFO), assuming that the aetiology of the stroke is secondary to a paradoxical embolism. After the PFO closure procedure a dual antiplatelet regimen is often prescribed for 3-6 months and several cardiologic and neurologic follow-up exams are scheduled in the first 12 months of follow-up. Usually a transthoracic +/- transoesophageal echocardiography (TTE +/- TEE) are performed at 6 months, however this kind of control is not systematically performed. In order to improve the clinical outcomes in this young patients' population, the investigators prospectively perform a complete cardiologic and neurologic follow-up program to all patients undergoing a successful percutaneous closure of a PFO. The aim of these controls is to confirm the good position of the PFO-device, to confirm the absence of any residual right to left shunt or any significant atrial arrhythmias Furthermore this prospective follow-up will analyze the possible mechanisms leading to a cerebral stroke recurrence (e.g. size of the PFO, presence of an atrial septal aneurysm, presence of a residual shunt, size of the utilized closure device, ....).