Arrhythmias refer to abnormal heart rhythms or irregular heartbeats. These deviations from the normal heartbeat pattern can occur in various ways, including the heart beating too fast (tachycardia), too slow (bradycardia), or with an irregular rhythm. Arrhythmias can affect the atria (upper chambers of the heart), the ventricles (lower chambers of the heart), or both.
Arrhythmias can result from various factors, including heart disease, electrolyte imbalances, certain medications, stimulants (such as caffeine or nicotine), excessive alcohol consumption, stress, and genetics. They can also occur in individuals with structurally normal hearts.
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