Hagrid is rushed to the hospital after experiencingsevere heart palpitations. The emergency team diagnoses it assupraventricular tachyarrhythmia and immediately administers an IVrescue medication. The administration does not act as potently asexpected and requires a higher dose. He does recover, but slowerthan expected. His wife confirms that the only drug he is taking istheophylline for emphysema, though he accidentally double-dosed themorning. Based on the information provided, i) name the drug usedas a rescue medication, ii) explain how it relieves the arrhythmia,and iii) explain why it did not work as effectively asexpected. Â
