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.
King penguins are very social birds, and live in colonies with populations of up to 39,000 breeding pairs. The colonies are generally found on large, sparsely vegetated areas of the islands they inhabit because king penguins avoid climbing.ptenodytes patagonicus (king penguins) colonies are mainly located on islands surrounding Antarctica. Islands include Crozet, Falkland, Heard, Kerguelen, Macquarie, Prince Edward, South Georgia and South Sandwich.