![]() Atrial fibrillation (AFib) is the most common type of abnormal heart rhythm. Symptoms depend on how fast the ventricles contract and may include palpitations, weakness, dizziness or light-headedness, shortness of breath, and chest pain. Without treatment, AFL can also cause another type of arrhythmia called atrial fibrillation. This can lead to heart failure and long-term disability. When the ventricles beat too fast for long periods of time, the heart muscle can become weak and tired. This means that the ventricles are beating too fast. Without treatment, AFL can also cause a fast pulse rate for long periods of time. If the clot is pumped out of the heart, it could travel to the brain and lead to a stroke or heart attack. With the blood moving more slowly, it is more likely to form clots. AFL makes it harder for the heart to pump blood effectively. If left untreated, the side effects of AFL can be potentially life threatening.
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