1. Prevalence, mechanisms and impact of residual patency and device-related thrombosis following left atrial appendage occlusion: a computed tomography analysis
- Author
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Lluis Asmarats, Xavier Millán, Antonio Serra, Victor Agudelo, Chi-Hion Li, Dabit Arzamendi, and Abdel-Hakim Moustafa
- Subjects
medicine.medical_specialty ,Leak ,Septal Occluder Device ,medicine.medical_treatment ,Computed tomography ,Left atrial appendage occlusion ,Clinical Research ,Left atrial ,Internal medicine ,Atrial Fibrillation ,MSCT ,Prevalence ,medicine ,Humans ,Atrial Appendage ,atrial fibrillation ,Thrombus ,medicine.diagnostic_test ,business.industry ,Thrombosis ,medicine.disease ,Peripheral ,Treatment Outcome ,LAA closure ,Embolism ,Cardiology ,Tomography, X-Ray Computed ,Cardiology and Cardiovascular Medicine ,business ,Echocardiography, Transesophageal - Abstract
BACKGROUND: Cardiac computed tomography angiography (CCTA) appears to be an appropriate imaging technique for device surveillance after left atrial appendage occlusion (LAAO). However, the available experience is limited. AIMS: The aim of this study was to determine the prevalence, mechanisms and clinical impact of left atrial appendage (LAA) patency and device-related thrombosis (DRT) following LAAO utilising a novel CCTA-based classification. METHODS: Consecutively enrolled patients who underwent LAAO with an AMPLATZER device were followed up with CCTA. Mechanisms and frequency of residual patency were evaluated and correlated with clinical events. Atrial-side device thrombus, device positioning and presence of signs of device stability were also analysed. RESULTS: A total of 137 patients were included. LAA patency was observed in 56.9% (n=78). Mechanisms and frequency of patency were: malapposition of proximal segment of the device lobe (55.1%), peri-device leak (PDL, 34.6%) and fabric permeability (5.8%). Lobe-LAA axis misalignment was the only independent predictor of device patency after LAAO (HR 38.3, 95% CI: 13.6-107.0; p
- Published
- 2021
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