Thanks
Cardiologist (Heart Specialist)
We certainly know that atrial fibrillation over a considerable period of time can lead to heart muscle weakness. It can damage the bottom, or pumping chambers of the heart simply because the heart is beating too quickly. In addition, we can develop changes in the atria themselves, because they're not contracting efficiently. The atria can get bigger and larger and this can lead to problems with the mitral valve. So yes, atrial fibrillation can damage the heart, particularly when it's not adequately controlled.
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