Without treatment, AFib can also cause a fast pulse rate for long periods of time. This means that the ventricles are beating too fast. When the ventricles beat too fast for long periods of time, the heart muscle can become weak. This condition is called cardiomyopathy. This can lead to heart failure and long-term disability.
To help prevent these complications, treatment for AFib usually includes one medication to reduce the chance of blood clots and stroke, and another to keep the pulse from going too fast.