ATRIAL FIBRILLATION (AF )is typically characterized by chaotic, disorganized electrical activity in the upper chambers of the heart. When AF occurs, the upper chambers of the heart (atria) quiver rapidly and irregularly (fibrillate).

It results from abnormal electrical activity in the atria, the top chambers of the heart, and causing them to contract randomly and often very fast, resulting in the heart muscle not being able to relax properly between beats. This reduces the heart’s efficiency and performance, and may lead to rapid, irregular palpitations, breathlessness, chest pain, lightheadedness and fatigue. Some people with AF are asymptomatic and may only be diagnosed when they are having investigations for other reasons or have developed a complication such as a stroke.


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