NobleStitch EL STITCH Trial is a PFO Comparative Trial

Inclusion Criteria:

• Provision of signed and dated informed consent form

• Stated willingness to comply with all study procedures and availability for theduration of the study

• Male or female ages 18 - 60 years old

• A PFO and a Cryptogenic Stroke verified by a neurologist

• Stroke is defined as an acute focal neurological deficit, presumed to be due tofocal ischemia, and either:

• Symptoms persisting ≥24 hours, or

• Symptoms persisting <24 hours with Magnetic Resonance or CT findings of a new,neuroanatomical relevant infarct

• Cryptogenic stroke was defined as a stroke of unknown cause

• Prolonged cardiac rhythm monitoring (recommended 30 days and not less than 24 hoursrequired)

• Intra and extracranial artery imaging: Magnetic Resonance Angiography, CTangiography, or contrast angiography, or contrast angiography or echocardiography ofthe carotid arteries to rule out ischemic stroke associated with atheroscleroticplaque, arterial dissection, or other vascular diseases. (The aortic arch may alsobe evaluated by TEE).

• Hypercoagulable state assessment to rule out an underlying hypercoagulable state

Exclusion Criteria:

• Female participant who is pregnant, lactating or planning a pregnancy during thecourse of the study

• Age <18 or > 60 years of age

• Previous myocardial infarction or unstable angina within 6 months

• Clinically significant mitral or aortic valve stenosis or severe regurgitation

• Left Ventricular Ejection Fraction <50 percent

• Progressive neurological dysfunction or reduced life expectancy

• Contrast allergy

• Atrial Septal Defect (baseline left to right shunt assessed by TEE or othercongenital heart diseases

• Active Endocarditis

• Perspective participants with known causes of Ischemic Stroke

• Arterial dissection

• Contraindicated or unsuitable for antiplatelet agents or oral anticoagulants

• Perspective participants with prosthetic heart valves

• Uncontrolled diabetes Mellitus

• Pulmonary hypertension

• Uncontrolled systemic hypertension

• Intracranial pathology

• Neurological deficits not due to stroke that may affect neurologic assessments

• Active autoimmune disease

• Active infection

• Alcohol and/or drug abuse

• A requirement for chronic anticoagulation therapy that cannot be discontinued

• Anatomic features (inability to achieve vascular access)