Atrial fibrillation is a cardiac arrhythmia in which the upper chambers of the heart the atria beat irregularly and, often, rapidly. The condition occurs as a consequence of uncoordinated electrical ...
Sick sinus syndrome (SSS) is a heart rhythm problem that affects your heart's natural pacemaker. You may develop symptoms of SSS like dizziness, fainting, and fatigue. Treatment may include lifestyle ...
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