evaluation of cerebral thrombembolism after tavr

Conditions: Aortic Valve Stenosis; Transcatheter Aortic Valve Replacement; Intracranial Embolism

Summary: earth-tavr is a diagnostic multicenter study to evaluate the occurrence and extent of cerebral embolization (total new lesion volume) in patients before tavr versus 3 months after tavr.

calcific aortic valve stenosis is the most common cause of aortic stenosis (as) among adults in europe and in the united states. the prevalence of moderate or severe as was found to be age-dependent rising from 0.02% in patients aged 18-44 years to 2.8% in patients aged ≥ 75 years. among patients at prohibitive surgical risk, tavr has become the treatment of choice.the safety and efficacy of tavr compared with medical management and savr has been demonstrated in clinical trials.the composite of the rate of all-cause death or stroke was 27% and 37% in tavr patients after 1 and 2 years, respectively.even though parts of the strokes occur during the peri-procedural period, the patients remain at risk of stroke throughout the first months after the procedure. earth-tavr is a diagnostic multicenter study performing in association with the galileo trial (nct02556203), which is investigating cerebral embolization with mri and neurocognitive testing in patients undergoing tavr, who are treated with anticoagulation (rivaroxaban/ass) or dapt (clopidogrel/ass). galileo is a global multicenter, open-label, randomized, event-driven, active-controlled study comparing a rivaroxaban-based antithrombotic strategy to an antiplatelet-based strategy after transcatheter aortic valve replacement (tavr) to optimize clinical outcomes. investigators aim to investigate peri-interventional and delayed cerebral embolization in the early period (3 months) after tavr and to analyze associations between neurocognitive parameters and cerebral embolization patterns in patients on different antithrombotic treatment regimes.

Eligibility criteria:
inclusion criteria: * man or woman of 18 years of age or older * via iliofemoral or subclavian access * provide written ic exclusion criteria: * atrial fibrillation (af), current or previous, with an ongoing indication for oral anticoagulant treatment * any other indication for continued treatment with any oral anticoagulant (oac) * known bleeding diathesis (such as but not limited to active internal bleeding, clinically significant bleeding, platelet count ≤ 50,000/mm3 at screening, hemoglobin level \< 8.5 g/dl, active peptic ulcer or known gastrointestinal (gi) bleeding, history of intracranial hemorrhage or subdural hematoma) * any indication for dual-antiplatelet therapy (dapt) for more than 3 months after randomization (such as coronary, carotid or peripheral stent implantation) * clinically overt stroke within the last 3 months * planned coronary or vascular intervention or major surgery * severe renal impairment (egfr \< 30 ml/min/1.73 m2) or on dialysis, or post-tavr unresolved acute kidney injury with renal dysfunction stage 2 or higher * moderate and severe hepatic impairment (child-pugh class b or c) or any hepatic disease associated with coagulopathy * any contraindication for cerebral mri, in particular: * non-mri-conditional pacemakers * mri conditional pacemakers \<4 weeks after implant * any metal fragments in the eye * aneurysm clip in the brain * severe claustrophobia

Keywords: tavr tavi transcatheter aortic valve replacement intracranial embolism