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Complex fractionated atrial electrocardiograms (CFAEs) guided ablation versus pulmonary vein isolation guided ablation in persistent atrial fibrillation, a multicenter randomized trial

to compare the efficacy and safety of complex fractionated atrial electrocardiograms (CFAEs) guided ablation to pulmonary vein isolation based ablation in patients with persistent atrial fibrillation (AF).

VASCO study: A population-based prospective cohort study on vaccine effectiveness of COVID-19 vaccines in the Netherlands

The primary objective is to estimate product-specific vaccine effectiveness (VE) of the COVID-19 vaccines that are used in the Dutch national vaccination program against symptomatic SARS-CoV-2 infection by age and medical risk group at a time point…