Atrial septal defect. (Redirected from Patent foramen ovale) Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart. Normally, the atria are separated by a dividing wall, the interatrial septum.
If you think your cat is sleeping a lot, youâre not off base. Cats tend to sleep in some form or another for anywhere from 16 to 20 hours a day.
I realize no two cats are alike, but how much sleep does a normal feline need? My 5-year-old tabby, Roz, snoozes up to 18 hours a day! W.B., Lansing, Michigan. Given the opportunity, most cats--from small ones such as your tabby to big panthers--will curl up in a warm, cozy spot and nap all day.