ADAMTS13 and atrial fibrillation: These results are partly incontrast to Hanson et al who found the allele to benon-significantly associated with a decreased risk of ischemic stroke.9 Lowerlevels of ADAMTS13 antigen and activity, as well as several other ADAMTS13 SNPs,have previously been associated with ischemic stroke.5,15,18 In the present study,patients with the G-allele also presented with an increased occurrence of AF atbaseline, not previously reported.