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经导管主动脉瓣置换

科研文章

荐读文献

Rationale and design of a randomized clinical trial comparing safety and efficacy of Myval transcatheter heart valve versus contemporary transcatheter heart valves in patients with severe symptomatic aortic valve stenosis: the LANDMARK trial Anticoagulation with or without Clopidogrel after Transcatheter Aortic-Valve Implantation Single Versus Dual Antiplatelet Therapy Following TAVR: A Systematic Review and Meta-Analysis of Randomized Controlled Trials Anticoagulation After Surgical or Transcatheter Bioprosthetic Aortic Valve Replacement Comparison of Early Surgical or Transcatheter Aortic Valve Replacement Versus Conservative Management in Low-Flow, Low-Gradient Aortic Stenosis Using Inverse Probability of Treatment Weighting: Results From the TOPAS Prospective Observational Cohort Study Coronary Access After TAVR With a Self-Expanding Bioprosthesis: Insights From Computed Tomography Transcatheter Aortic Valve Replacement in Low-Risk Patients With Symptomatic Severe Bicuspid Aortic Valve Stenosis A Controlled Trial of Rivaroxaban After Transcatheter Aortic-Valve Replacement Short Length of Stay After Elective Transfemoral Transcatheter Aortic Valve Replacement Is Not Associated With Increased Early or Late Readmission Risk Transcatheter Aortic Valve Replacement: Role of Multimodality Imaging in Common and Complex Clinical Scenarios

Original Research2020 Sep 1;41(33):3184-3197

JOURNAL:Eur Heart J . Article Link

Leaflet immobility and thrombosis in transcatheter aortic valve replacement

ACT Ng, DR Holmes, MJ Mack et al. Keywords: antiplatelet therapy; antithrombotic treatment; thrombosis; transcatheter aortic valve replacement; transcatheter heart valve

ABSTRACT

Transcatheter aortic valve replacement (TAVR) has grown exponentially worldwide in the last decade. Due to the higher bleeding risks associated with oral anticoagulation and in patients undergoing TAVR, antiplatelet therapy is currently considered first-line antithrombotic treatment after TAVR. Recent studies suggest that some patients can develop subclinical transcatheter heart valve (THV) thrombosis after the procedure, whereby thrombus forms on the leaflets that can be a precursor to leaflet dysfunction. Compared with echocardiography, multidetector computed tomography is more sensitive at detecting THV thrombosis. Transcatheter heart valve thrombosis can occur while on dual antiplatelet therapy with aspirin and thienopyridine but significantly less with anticoagulation. This review summarizes the incidence and diagnostic criteria for THV thrombosis and discusses the pathophysiological mechanisms that may lead to thrombus formation, its natural history, potential clinical implications and treatment for these patients.