Definition: Arrhythmia: A condition where irregular heartbeats occur without normal rhythm. It can be caused by a variety of conditions including blockages, disorders, or medical procedures. Detailed definition: arrhythmia occurs when there are irregular heartbeat patterns, which usually start and stop abruptly and can cause symptoms such as palpitations (feeling of air in the chest), shortness of breath, lightheadedness, nausea, vomiting, confusion, or seizures.
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