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Atrial fibrillation and flutter are irregular heart rhythms that occur when the upper chambers of the heart beat irregularly or too fast. Fibrillation can be sustained…


Arrhythmias may be caused by many different factors, including ... Irregular heart rhythms can also occur in "normal, ...


A heartbeat that is occasionally irregular usually is not a concern if it does not cause other symptoms, such as dizziness, lightheadedness, or shortness of breath.


Jul 12, 2017 ... WebMD explains the possible causes of heart palpitations -- and when to ... herbal and nutritional supplements; Abnormal electrolyte levels.


Aug 4, 2017 ... A fluttering in your chest; A racing heartbeat (tachycardia); A slow ... Narrowed heart arteries, a heart attack, abnormal heart valves, prior heart ...


Sep 19, 2016 ... ... understand the causes of abnormal heart rhythms or arrhythmias, ... These can be signs of arrhythmia, or abnormal or irregular heartbeat.


Dec 21, 2016 ... If your arrhythmia is abnormal and clinically significant, your doctor will set a ... Treat heart disease/condition that may be causing arrhythmia ... Certain substances can contribute to an abnormal/irregular heartbeat, including:.


Jul 6, 2016 ... Rapid heart rate can cause sudden cardiac arrest but is treatable. When atrial fibrillation's irregular heart rate is not controlled, it can lead to ...


Jul 18, 2017 ... For instance, some people experience irregular heartbeats, which may feel like a racing heart or fluttering. Many heart arrhythmias are ...