The heart beat and pumping action may not be adequate causing symptoms such as fatigue dizziness near fainting or even fainting another form of bradycardia may be caused when the hearts normal pacemaker the sinus node does not work with regularity this is known as sinus node dysfunction and may cause a heartbeat that is too slow. The heart and its electrical system the hearts main job is to pump blood the upper chambers atria take in blood from your lungs and body and they pass that blood on to the lower chambers ventricles through your hearts first set of valves. Atrial fibrillation is a condition that disrupts your heartbeat a glitch in the hearts electrical system makes its upper chambers the atria beat so fast they quiver or fibrillate. Understanding the hearts electrical system your heart has its own internal from healthed 101 at babajide school of prophets and evangelist cac theological seminary ilesha campus
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