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.
A healthy, full grown cat should sleep about 14-16 hours a day. A full grown cat with an illness usually sleeps about 18 hours. Almost all kittens sleep about 17-20 hours a day. Newborn kittens are the ones who sleep for 23 hours a day.