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.
February 16, 2007 By. If youâve spent any time with cats, youâve probably noticed that they spend a lot of quality time snoozing. In fact, cats sleep anywhere from 13 to 16 hours per day. In other words, your friendly companion feline spends approximately 2/3 of his entire life in dreamland. Cats sleep more than almost any other mammal. Realistically, your cat sleeps about twice as much as you do.