Why atrial fibrillation increases the efficiency of the heart?

This can result in fainting or heart failure. Atrial fibrillation is abnormal heart palpitations. When the palpitations are abnormal, faster than usual, it can be very dangerous depending on the severity. You should check with your doctor to see the possible cause of this. This could be a result of carbon monoxide poisoning, high blood pressure, and many many more things. If this is a long term effect you may qualify for disability benefits.