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.
About 96 percent of cat owners allow their cats to sleep in the bedroom. Almost 50 percent of those cats are allowed to sleep in the bed. And 38 percent of those sleep on the pillow with the owner. It should be noted, too, that younger cats prefer the pillow, while older cats prefer to sleep at the foot of the bed. Although the amount of time spent sleeping varies from cat to cat, and depends on age and personality, felines spend an average of 13 to 16 hours each day curled up in slumber.