Palpitations are an unpleasant sensation of a self-perceived heartbeat. The sudden onset of palpitations may be triggered by premature beats or tachycardia, and psychological factors may not be ruled out as the cause of this abnormal sensation. When palpitations occur, it is recommended that patients should first remain at rest, for example, if they are active, they should immediately stand still and find a nearby position to sit down, or lie down for a while if they happen to be on the edge of the bed. If the patient is elderly and has a history of coronary artery disease, he or she may also take sublingual salvia drops, which do not exclude palpitations due to myocardial ischemia. If the blood pressure is not low and the heart rate is fast, then a beta-blocker can also be given in combination. After the above medications, if the symptoms are persistent and no relief is seen, then it is recommended to go to the hospital for an electrocardiogram to determine if supraventricular tachycardia or atrial fibrillation, atrial flutter, etc. is occurring. If all three of these problems are present, then the patient is advised to administer cantharone, and if it does not return to sinus rhythm, further cantharone can be administered. When administering the drug urgently, it is important to monitor blood pressure and heart rate, and to give the patient oxygen therapy. After intravenous administration, it is recommended that the patient take up to a short period of time and then gradually reduce the dose and stop taking it. While correcting palpitations, attention should be paid to identifying the causes of palpitations. Common clinical causes of palpitations include ionic disorders, abnormal thyroid function, psychosomatic diseases, cardiomyopathy, coronary artery disease, etc.