What Is Atrial Fibrillation?

Atrial fibrillation is a fast and very irregular heart rhythm. While atrial fibrillation (AFib) is not itself life-threatening, it often causes significant symptoms, including palpitations, shortness of breath, and easily becoming fatigued. It can lead to more serious problems, especially stroke, and—in people with heart disease—worsening heart failure. Several treatment options are available for fibrillation…

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