New research shows that cryoablation is a safe and effective approach to close congenital patent foramen ovale (PFO, a small hole in the heart) in patients with atrial fibrillation (AF) undergoing ...

‘This time last year I had a procedure done to close a hole I had in my heart known as a PFO (Patent Foramen Ovale)following having a transient stroke,’ Hailey Bieber wrote on Instagram yesterday.