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.
Anywhere from 16 to 20 hours a day, typically. A newborn sleeps almost 24/7. Cats do spend at least two-thirds of their lives asleep. Cats are crepuscular, that means they are most active during twilight. So usually while you are asleep, cats spend their time awake, investigating your house.