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.
The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species and is endemic to Antarctica.The male and female are similar in plumage and size, reaching 122 cm (48 in) in height and weighing from 22 to 45 kg (49 to 99 lb).he emperor penguin breeds in the coldest environment of any bird species; air temperatures may reach â40 Â°C (â40 Â°F), and wind speeds may reach 144 km/h (89 mph). Water temperature is a frigid â1.8 Â°C (28.8 Â°F), which is much lower than the emperor penguin's average body temperature of 39 Â°C (102 Â°F).