Weakness
In the case of atrial fibrillation, the heart muscles do not effectively contract, which causes a buildup of fluid in your feet, ankles, and legs. The fluid buildup results in discomfort and muscle weakness, which is very common to experience atrial fibrillation patients. As the upper chambers of the heart do not synchronize with the beating of the lower chambers, the heart works harder, and there is improper circulation of blood throughout the body. The improper circulation also leads to the supply of less oxygenated blood, which ultimately causes muscle weakness. A person feels weak, performing the daily chores of their routine if they are suffering from atrial fibrillation.