European Study Evaluating the EMBLOK Embolic Protection System During TAVR

Inclusion Criteria: Subject is between 18 and 90 years of age.Subject is scheduled to undergo transcatheter aortic valve replacement (TAVR) procedure on a native aortic valve and is qualified based on pre-operative trans-thoracic echocardiogram (TTE). Subject anatomy is compatible with correct device positioning with: Iliofemoral access compatible with a 12 French arterial access system for the EMBLOK catheter (\> 4 mm vessel diameter). Ascending aorta length greater than or equal to 9 cm. Ascending aorta/aortic arch diameter less than or equal to 35mm. Female subjects of child bearing potential must have a negative pregnancy test within 48 hours prior to the index study procedure.Subject agrees to comply with all study required visits. Subject or subject's legal representative completes written Informed Consent. Exclusion Criteria: Subject requires an emergent procedure. Contraindications to MRI including: Subjects with any non-MRI compatible implantable temporary or permanent pacemaker or defibrillator, metal implants in field of view, metallic fragments, clips, or devices in the brain or eye before TAVI procedure, claustrophobia, planned implantation of non-MRI compatible pacemaker or implantable cardioverter defibrillator within 30 days after TAVR. Subject has experienced a myocardial infarction within 30 days of the planned index procedure. Subject has renal insufficiency, defined as a creatinine level \> 2.5 mg/dl at the time of treatment. Subject has documented history of stroke or TIA within prior 3 months. Subject has an ejection fraction of 30% or less. Subject has a history of intolerance, allergic reaction or contraindication to any of the study medications, including heparin, aspirin, clopidogrel or a sensitivity to contrast media or anesthesia which cannot be adequately pre-treated. Subject has known allergy to any materials used in the EMBLOK device or allergy to intravascular contrast agents that cannot be pre-medicated. Subject has active endocarditis or an ongoing systemic infection defined as fever within temperature \> 38° C and/ or WBC \> 15,000 IU. Subjects undergoing therapeutic thrombolysis. Subject has history of bleeding diathesis or a major coagulopathy. Subject is known or suspected to be pregnant, or is lactating. Subject is currently participating in another drug or device clinical study, or has other medical illnesses that may cause the subject to be non-compliant with the protocol or confound the data interpretation.