If the heart beats fast and can’t catch its breath for physiological reasons, you need to rest to recover, and if for pathological reasons, you need to be treated under the guidance of a physician for the relevant cause of the disease. 1. Physiological reasons: normal people after strenuous exercise may appear heart rate increase, so that shortness of breath discomfort, at this time the need to rest sufficiently can be relieved. 2. Pathologic causes: Commonly caused by rapid heart rate shortness of breath discomfort of diseases such as tachyarrhythmia, acute myocardial infarction, acute heart failure and so on. (1) Tachyarrhythmia requires oral antiarrhythmic drugs such as amiodarone and metoprolol. (2) Acute myocardial infarction requires prompt revascularization and oral antiplatelet drugs such as clopidogrel, aspirin, etc. and lipid-lowering drugs such as pitavastatin, resuvastatin, etc. (3) In case of acute heart failure, cardiotonic, diuretic, and vasodilator treatments are needed. Cardiotonic drugs such as digoxin, cediran, etc.; diuretics such as furosemide, hydrochlorothiazide, spironolactone, etc.; vasodilator drugs such as nitroglycerin, sodium nitroprusside. There are other diseases that cause rapid heart rate and shortness of breath, such as hyperthyroidism, acute poisoning, acute exacerbation of chronic obstructive pulmonary disease, etc. If the patient has symptoms of rapid heart rate and shortness of breath, it is recommended to consult a doctor in a timely manner, and under the guidance of the physician to improve the relevant examinations to clarify the cause of the disease and standardize the treatment, and avoid unauthorized use of medication to avoid the adverse consequences.