There are various types of abnormal heart beats and one of the most common is atrial fibrillation.
Atrial fibrillation involves the upper chambers of the heart, the atria.
The electrical impulses of the heart that control the heart beat do not work properly causing the atria not to contract in an organized fashion. It can occur at any age but it most frequently affects people 50 years or older. It is associated with the presence of prior heart disease, high blood pressure, alcohol intake, and hyperthyroidism. The cause is frequently unknown. Symptoms include heart palpitations, chest discomfort, shortness of breath, fatigue, light-headedness, and a sense of anxiety.