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.
Where do penguins live? King Penguins are found in Tierra del Fuego, Subarctic islands and South Georgia Island. Chinstrap Penguins are found in Antarctica, South Sandwich Islands, South Shetland, South Orkneys, South Georgia Island Bouvet, Peter Islands and Balleny.