Fibrillation

Fibrillation is like a hiccup in your heart. Your heart is supposed to pump strong and steady. When you have fibrillation, your heart's pumping gets all mixed up and starts to beat in a funny way. It can beat too fast or too slow. Fibrillation can make it hard for your heart to pump blood, which makes it harder for you to do activities and can even make you feel sick.