Rapid heartbeat can be self-relieved by massage, medication, or by diverting attention and adjusting breathing. If the rapid heartbeat is triggered by a moment of tension, fear, or excitement, you can take a few deep breaths, divert your attention by reading a book, playing a game, or talking, and regulate your heartbeat by calming your mood. If you don’t get relief, you can massage the unilateral carotid sinus. Long-term tachycardia that cannot be relieved by conventional methods can be treated with medication, such as stabilized heart pellets and amiodarone. You should seek medical advice and follow the doctor’s instructions, and never take medication on your own.