Using Left Atrium Appendage Closure in NVAF Patients With High Risk of Ischemic Stroke

Study Overview
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Brief Summary
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To evaluate the safety and efficacy of using Microport CardioAdvance Left Atrium Appendage Closure for preventing stroke in Non-valvular atrial fibrillation (NVAF) patients who have contraindications for long-term anti-coagulation. And to support registration approval from National Medical Products Administration (NMPA).

Detailed Description
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SAFE-PROTECT trial is composed of Roll-in group, small-size group and RCT group. This trial is planned to conduct in about 20 sites from China. Roll-in group plans to enroll at most 3 subjects each site to implant experimental device for exploration and observation. RCT group plans to enroll no less than 210 subjects who meet the inclusion/exclusion criteria, and 1:1 randomly allocated to experimental arm or comparator arm.

Official Title
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Safety And EFficacy of Using LEft Atrium APpendage Closure in Nonvalvular AtRial FibrillatiOn PatienTs With High Risk of ischEmiC sTroke -- A Prospective Multicenter Randomized Clinical Trial

Conditions
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Atrial Fibrillation, Stroke

Intervention / Treatment
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* Device: Left atrial appendage closure procedure


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Non valvular atrial fibrillation subjects aged ≥18 and ≤80; High risk of ischemic stroke: CHA2DS2VASc score ≥ 2 ( ≥ 3 for female) together with any of the following circumstances: With a recorded history (happened earlier than 6 months from now) of bleeding (including gingival/nasal/oral bleeding, skin &soft tissue bleeding, gastrointestinal bleeding, urinary tract bleeding, cerebral haemorrhage, etc.) or bleeding tendency; Intolerance or rejection of long-term anti-coagulation therapy; Suffering stroke or embolism despite routine anti-coagulation therapy; With a predicting HAS-BLED score ≥3. Subjects (or his/her legal representatives) are able to understand the study objectives, willing to cooperate with procedure and follow-up. Subjects who voluntarily participate in this trial and have signed the written informed consent form. Exclusion Criteria: Subjects with atrial fibrillation (AF) caused by rheumatic valvular disease, moderate to severe mitral stenosis, severe mitral regurgitation, severe aortic valve disease or severe left ventricular outflow tract obstruction with pressure difference greater than 40mmHg; Suffering with other disease(s) requiring long-term oral anticoagulation treatment; Initial untreated AF, or secondary AF with clear cause (such as hyperthyroid heart disease); Intracardiac thrombus (including left and/or right atrium) found or persisted; Suffered with myocardial infarction within 3 months; History of previous atrial septum repair operation or Atrial Septal Occluder implantation; History of previous heart valve (mechanical valve) replacement operation; Subjects undergoing heart transplant operation; Subjects with symptomatic carotid artery disease (such as carotid stenosis > 50%) or subjects with vulnerable carotid artery plaque. Suffered with ischemic stroke or TIA recently (within 30 days); Known complex active atherosclerotic plaque(s) in the descending aorta or aortic arch; Severe heart failure (NYHA Grade Ⅳ); The investigator assessed that there were abnormal result(s) with clinical significance in the routine blood test of subjects； Severe renal abnormal: serum creatinine >250μmol/l; or on dialysis; Allergic or contraindicated to aspirin, clopidogrel, heparin, contrast agent, and nitinol alloy; Subjects who are scheduled to receive operation within 1 year after procedure, and need to stop anti-thrombotic therapy; Pregnant or breast-feeding subjects, or subjects who plan to have a child within 1 year after procedure; Subjects with a life expectancy less than 12 months; Subjects who are participating in another investigational drug or device clinical trial in which the primary endpoint is still not reached before enrolment; Subjects have other reasons that cannot maintain 2 months anticoagulation or 6 months dual antiplatelet therapy; Subjects with poor compliance (judged by investigator) or cannot complete the study according to the protocol due to other reasons; Subjects who are unsuitable to receive LAA occlusion treatment (judged by investigator).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Microport CardioAdvance LAAC system<br>Subject implant Microport CardioAdvance LAAC system to occlude LAA through percutaneous intervention. | Device: Left atrial appendage closure procedure<br>* Implant LAAC system in LAA through percutaneous intervention<br>|
| Active Comparator: Watchman LAAC system<br>Subject implant Watchman LAAC system to occlude LAA through percutaneous intervention. | Device: Left atrial appendage closure procedure<br>* Implant LAAC system in LAA through percutaneous intervention<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Clinical success | Freedom from ischemic stroke, hemorrhagic stroke, systemic embolism, cardiovascular death and unexplained death | 12-month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| LAA occlusion success | TEE examination showing that the residual shunt < 5mm jet width or complete occlusion of LAA | 12-month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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LAAC, NVAF, ischemic stroke