In biochemistry, Adenosine triphosphate (ATP) is a nucleotide that acts as a “molecular currency” for intracellular energy transfer, storing and transferring chemical energy. The structure of the ATP molecule can be abbreviated as A-P~P~P, where A stands for adenosine, P stands for phosphate group, and ~ stands for a special chemical bond called high-energy phosphate bond, when the high-energy phosphate bond is broken, a lot of energy will be released. The energy released during the hydrolysis of high-energy phosphate bonds is as much as 30.54 kJ/mol, so ATP is said to be an intracellular high-energy phosphate compound. Indications: Supraventricular tachycardia. Adenosine triphosphate is currently considered safe and effective in the treatment of pediatric supraventricular tachycardia, and has become the first-line drug to terminate episodes of supraventricular tachycardia. However, it is ineffective in the treatment of intra-atrial folding tachycardia autonomous atrial tachycardia, and cannot be applied to atrial folding tachycardia retrograde type, otherwise it is likely to accelerate the ventricular rate, and even ventricular fibrillation occurs. Dose: The first dose of 0.1mg/kg is rapidly pushed intravenously within 3-5s, if it is ineffective, the second dose can be injected after 3 minutes of ineffectiveness, each time in increments of 0.05-01mg/kg until the maximum amount of 0.25-0.3mg/kg or tachycardia is terminated. The injection site should be in the upper extremity or in the blood vessels close to the heart, otherwise it is easy to fail or requires a large dose, and the side effects increase with increasing dose. In case of severe bradycardia after injection, aminophylline can be used to relieve it at a dose of 5-6 mg/kg for more than 5 minutes; atropine is prohibited. Side effects and precautions: facial flushing, excitation of asthma, sinus arrest, atrioventricular block, respiratory and cardiac arrest, and decrease in blood pressure. Efficacy depends not only on the dose and rate of administration of adenosine triphosphate, but also on the heart spacing, vagal and adrenergic tone at which the needle is administered. Contraindications: Contraindicated in children with asthma and in those with hypersensitivity to adenosine triphosphate.