Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating.
Emperor penguin - Aptenodytes forsteri. This is the largest species of penguins. Emperor penguins are only found on and around the Antarctic continent, on the thick pack ice and rarely on mainland. They have a pale yellow, open (breast and chin patch are one) patch on chin and breast. A long, thin and curved bill, typical for fish eaters. Very dark grey back and blue black head.
Penguins of Southern Chile & Argentina. The coasts of southern Chile and Argentina are home to three species of penguin: 1,700,000 pairs of Magellanic Penguin (Spheniscus magellanicus) 250,000 pairs of Southern Rockhopper Penguin (Eudyptes chrysocome) 12,000 pairs of Macaroni Penguin (Eudyptes chrysolophus)