1. Modeling material animals: mice, weighing 25-40g, both male and female; Medication: 10% urinary ester, verapamil; Equipment: Biological function experimental system.
2. Animal modeling method: Anesthetize animals with 10% urea ester 2mg/g, and inject verapamil 8 μ g/g (concentration of 2.5mg/ml) into the tail vein.
3. Modeling principle: Verapamil induces arrhythmia and establishes an animal model.
4. After modeling and injection, there is a latent period of about 10 seconds, during which bradycardia and second or third degree atrioventricular block occur, mainly bradycardia, which can last for about 10 minutes.