Patients who show evidence of new A-fib following noncardiac surgery are at the same long-term risk of thromboembolism as those with nonsurgical nonvalvular A-fib, according to new observational data.

Patients with cryptogenic stroke or migraine who undergo patent foramen ovale (PFO) closure are at a fourfold increased risk of new-onset A-fib compared with controls, according to a meta-analysis.