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.
Cats sleep about 14 hours out of 24, but not all at one time. Many are fairly nocturnal and active at times during the night. There's a reason for the expression catnaps. Can't really MAKE a cat sleep. But cuddling and petting and grooming and making her comfortable calms her down and sleep often follows.