What does "Atrial fibrillation" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
Atrial fibrillation is a heart condition that causes an irregular and often rapid heart rate. It occurs when the two upper chambers of the heart, known as the atria, beat chaotically and irregularly, out of coordination with the two lower chambers of the heart. This can lead to heart palpitations, shortness of breath and weakness. It's a serious condition because it can lead to blood clots, stroke, heart failure and other heart-related complications.
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