There are various causes of
tachycardia. These include
heart disease, high blood pressure, thyroid
disease, electrolyte imbalance, medications, caffeine, alcohol, smoking, or other recreational drug abuse, and psychological stress or anxiety. It is important to consider and treat the cause of the tachycardia, rather than just treating the condition. Simply slowing the heart rate could cause more harm if the rapid heartbeat is a symptom of a more serious or long-term problem.