Evaluation of Safety and Effectiveness of the EMBLOK EPS Compared With No Cerebral Embolic Protection During TAVR

N/ANot Yet RecruitingNCT07129421

Emblok, Inc.560 enrolled

Overview

The objective of the study is to evaluate the safety, effectiveness, and performance of the EMBLOK EPS during TAVR by randomized comparison with TAVR without embolic protection (unprotected TAVR). The targeted study population consists of patients meeting FDA-approved indications for TAVR with commercially available transcatheter heart valve systems. This prospective, multicenter, single-blind, randomized controlled trial will enroll up to a total of 560 subjects undergoing TAVR at up to 40 investigational sites in the United States. All subjects will undergo clinical follow-up (including detailed neurological assessments) in-hospital and at 30 days, and diffusion-weighted magnetic resonance imaging (DW-MRI) follow-up at 24 to 36 hours post-procedure.

Embolic stroke remains a major complication for TAVR, resulting in a two-fold increase in 1-year mortality. Embolic protection devices have been developed to filter embolic debris during the procedure, potentially reducing the occurrence of neurologic events associated with TAVR. The EMBLOK EPS may improve on currently available devices by capturing and retrieving debris directed toward all 3 cerebral vessels in the aortic arch as well as the descending aorta. The objective of the study is to evaluate the safety, effectiveness, and performance of the EMBLOK EPS during TAVR by randomized comparison with TAVR without embolic protection (unprotected TAVR). The targeted study population consists of patients meeting FDA-approved indications for TAVR with commercially available transcatheter heart valve systems. This prospective, multicenter, single-blind, randomized controlled trial will enroll up to a total of 560 subjects undergoing TAVR at up to 40 investigational sites in the United States. Prior to enrollment of the first randomized subject at each site, each site will enroll 2 Roll-In subjects (up to 80 subjects total), who will not be randomized but will receive the EMBLOK EPS during TAVR. In the randomized cohort, up to 480 subjects meeting eligibility criteria will be randomized 1:1 (stratified by operative risk and study site) to one of two treatment arms: 1. Intervention - EMBLOK EPS during TAVR 2. Control -Unprotected TAVR All subjects will undergo clinical follow-up (including detailed neurological assessments) in-hospital and at 30 days, and diffusion-weighted magnetic resonance imaging (DW-MRI) follow-up at 24 to 36 hours post-procedure.

Study Type

INTERVENTIONAL

Allocation

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Clinical Eligibility Criteria: Clinical Inclusion Criteria: Subjects must meet all the following criteria to be eligible for participation in the study: 1. Subject is ≥ 18 years of age. 2. Subject meets FDA approved indications for TAVR using an iliofemoral approach with a commercially approved transcatheter heart valve. 3. Female subjects of childbearing potential must have a negative serum or urine pregnancy test within 14 days prior to the index study procedure. 4. Subject agrees to comply with all protocol-specified procedures and assessments. 5. Subject or subject's legal representative signs an IRB/EC approved informed consent form prior to study participation. Clinical Exclusion Criteria: Subjects will be excluded if any of the following criteria apply: 1. Subjects with hepatic failure (Child-Pugh class C). 2. Subjects with hypercoagulable states that cannot be corrected by additional periprocedural heparin. 3. Subjects who have a planned treatment with any other investigational device or procedure during the study period. 4. Subjects planned to undergo any other cardiac surgical or interventional procedure (e.g., concurrent coronary revascularization) during the TAVR procedure or within 10 days prior to the TAVR procedure. NOTE: Diagnostic cardiac catheterization is permitted within 10 days prior to the TAVR procedure. 5. Subject has experienced an acute myocardial infarction (World Health Organization \[WHO\] criteria) within 30 days of the planned index procedure. 6. Subject requires an urgent or emergent TAVR procedure. 7. Subjects with renal failure (estimated Glomerular Filtration Rate \[eGFR\] \< 30 mL/min by the Modification of Diet in Renal Disease \[MDRD\] formula, or on dialysis). 8. Subject has documented history of stroke or transient ischemic attack within prior 6 months, or any prior stroke with a permanent major disability or deficit (baseline mRS ≥3). 9. Subject has an ejection fraction of 30% or less. 10. Subject has a sensitivity to contrast media that cannot be adequately pre-treated. 11. Subject has known allergy or hypersensitivity to any embolic protection device materials (e.g., nickel-titanium) or allergy to intravascular contrast agents that cannot be pre-medicated. 12. Subject has active endocarditis or an ongoing systemic infection defined as fever with temperature \> 38°C and/ or white blood cell \> 15,000 IU. 13. Subjects undergoing therapeutic thrombolysis. 14. Subject has history of bleeding diathesis or a coagulopathy or contraindications to anticoagulation and antiplatelet therapy. 15. Subject is known or suspected to be pregnant, or is lactating. 16. Subject has contraindications to cerebral MRI (e.g., body habitus that precludes imaging, claustrophobia, implanted non-MRI compatible permanent pacemaker or defibrillator, metallic clips or fragments). 17. In the investigator's opinion, the subject has other factors that may cause the subject to be non-compliant with the protocol or confound the data interpretation, such as participating in another drug or device clinical study, or other medical illness. General Anatomic Exclusion Criteria Subjects meeting any of the following criteria will not be eligible for participation in the study: 1. Non-iliofemoral approach is required for the TAVR system (e.g., trans-axillary, trans-subclavian, trans-brachiocephalic, trans-carotid, trans-apical or trans-aortic access for TAVR is required). 2. Subject peripheral anatomy is not compatible with contralateral iliofemoral access with an 11 French catheter (e.g., due to excessive tortuosity, stenosis, ectasia, dissection, or aneurysm). 3. Ascending aorta length (from the brachiocephalic artery takeoff to the most distal edge of the TAVR prosthetic device) less than 3.5 cm. 4. Diameter of the aorta at the intended site of Emblok filter deployment proximal to the brachiocephalic artery ostium is less than 25 mm or greater than 40 mm. 5. Subjects with severe peripheral arterial, abdominal aortic, or thoracic aortic disease that precludes delivery sheath vascular access. 6. Subjects in whom the aortic arch is heavily calcified, severely atheromatous, or severely tortuous.

Outcomes

Primary Outcomes

Primary Efficacy Endpoint

The primary efficacy endpoint is neuroprotection efficacy, determined by pair-wise comparisons among all subjects (Finkelstein-Schoenfeld \[FS\] method1) according to the following prespecified hierarchy of adverse outcomes: * Ischemic stroke (disabling or non-disabling) \[evaluated at 72 hours post-procedure\] * Total lesion volume by DW-MRI \[evaluated at 24-36 hours post-procedure\]

Time frame: Evaluated at 72 hours post-procedure (TAVR)

Primary Safety Endpoint

The primary safety endpoint is Major Adverse Events, defined as the composite of the following components at 30 days: * All-cause mortality * All stroke (disabling and non-disabling) * Acute kidney injury (Stage 3)

Time frame: Evaluated at 30-day post-procedure (TAVR) follow-up visit

Secondary Outcomes

Combined Safety and Efficacy

Combined safety and efficacy endpoint is defined as a composite of the following VARC-2 defined components, evaluated post-procedure and in-hospital: * All-cause mortality * All stroke (disabling and non-disabling) and transient ischemic attack (TIA) * Acute kidney injury - Stage 2 or 3 (including renal replacement therapy)

Time frame: Evaluated post-procedure (day 1), in-hospital (defined as 7 days post-procedure or immediately prior to discharge from the index procedure hospitalization, whichever occurs first)

Mortality (VARC-2 defined)

Mortality (VARC-2 defined), evaluated in-hospital, defined as All-cause mortality: * Cardiovascular mortality * Non-cardiovascular mortality

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up until 7 days post procedure, which ever occurs first.

Neurological Events (VARC-2 and NeuroARC defined)

Neurological Events (VARC-2 and NeuroARC defined) * Stroke (subclassified as ischemic, hemorrhagic, or undetermined, and as disabling or non-disabling) * TIA

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.

Incidence of acute kidney injury (AKIN classification)

Incidence of acute kidney injury (AKIN classification), subclassified as stage 1, 2, or 3 Acute Kidney Injury (AKIN Classification) * AKI Stage 1 * AKI Stage 2 * AKI Stage 3

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.]

Incidence of major vascular complications (VARC-3 defined)

Vascular Complications • Major vascular complications

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.]

Incidence of life-threatening or disabling bleeding and major bleeding (VARC-2 defined)

Bleeding Complications (VARC-2 defined) * Life-threatening or disabling bleeding * Major bleeding

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.

Major adverse embolic events (MAEE)

Incidence of the composite of all stroke (disabling or non-disabling) and transient ischemic attack (TIA), and Acute Kidney Injury Stage 2 or 3 (including renal replacement therapy), and systemic embolization Major adverse embolic events (MAEE) MAEE will be reported as a composite and components \[evaluated post-procedure and in-hospital\]: * All stroke (disabling and non-disabling) or TIA * Acute kidney injury (Stage 2 or 3, including RRT) * Systemic embolization

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up until 7 days post procedure, which ever occurs first.]

Imaging Endpoints: Total volume of new post-procedure cerebral ischemic lesions

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Total volume of new post-procedure cerebral ischemic lesions (TLV) (reported as continuous and categorical measures)

Time frame: Evaluated 24-36 hours post-procedure

Imaging Endpoints: Total supra-threshold cerebral ischemic lesion volume

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Total supra-threshold cerebral ischemic lesion volume (reported according to predefined thresholds)

Time frame: Evaluated 24-36 hours post-procedure

Imaging Endpoints: Presence of new post-procedure cerebral ischemic lesions

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Presence of new post-procedure cerebral ischemic lesions

Time frame: Evaluated 24-36 hours post-procedure

Imaging Endpoints: Number of new post-procedure cerebral ischemic lesions

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Number of new post-procedure cerebral ischemic lesions

Time frame: Evaluated 24-36 hours post-procedure

Imaging Endpoints: Average new lesion volume

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Average new lesion volume

Time frame: Evaluated 24-36 hours post-procedure

Imaging Endpoints: Largest per-subject single lesion

Imaging Endpoints \[assessed 24-36 hours post-procedure by an independent DW-MRI Core Laboratory\] • Largest per-subject single lesion

Time frame: Evaluated 24-36 hours post-procedure

Pathology Measures: Debris capture as the average number of captured particles ≥150 µm in diameter

Pathology Measures \[assessed post-procedure by an independent Pathology Core Laboratory only in subjects treated with EMBLOK EPS\] • Debris capture, defined as the average number of captured particles ≥150 µm in diameter

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Pathology Measures: Gross and histologic evaluation of captured debris

Pathology Measures \[assessed post-procedure by an independent Pathology Core Laboratory only in subjects treated with EMBLOK EPS\] • Gross and histologic evaluation of captured embolic debris, including particle presence, count, size, and composition.

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Neurocognitive Measures: NIHSS worsening

Neurocognitive Measures • NIHSS worsening (increase of 2 or more from baseline)

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.]

Neurocognitive Measures: MoCA worsening

Neurocognitive Measures • Montreal Cognitive Assessment (MoCA) worsening (decrease of 2 or more from baseline)

Time frame: Evaluated immediately after the intervention/procedure, up until discharge from hospital or up to 7 days post-procedure, and at the 30 day follow-up visit.]

Secondary Device Performance Endpoints: Successful device deployment

• Successful device deployment, defined as ability to successfully deliver the device to the site of filter placement and successfully deploy the device.

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Secondary Device Performance Endpoints: Successful device positioning

• Successful device positioning, defined as ability to position the device and to maintain the device in place for the duration of the TAVR procedure (as assessed by an independent Angiographic Core Laboratory)

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Secondary Device Performance Endpoints: Successful device retrieval

• Successful device retrieval, defined as ability to retrieve the device intact

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Secondary Device Performance Endpoints: Device success

• Device success, defined as successful deployment, positioning and retrieval

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Secondary Device Performance Endpoints: Procedure success

• Procedure success, defined as device success in the absence of in-hospital embolic protection device-related major adverse cardiac and cerebrovascular events (MACCE). MACCE is defined as the composite of all-cause mortality, all stroke, and major vascular complications.

Time frame: Evaluated at the time of the TAVR procedure (during the intervention/procedure)

Evaluation of Safety and Effectiveness of the EMBLOK EPS Compared With No Cerebral Embolic Protection During TAVR

Overview

Conditions

Interventions

Eligibility

Outcomes

Primary Outcomes

Secondary Outcomes

Central Contacts