Intravenous anesthesia is administered intravenously to provide a general anesthetic effect. Intravenous anesthetics include sedatives, analgesics, and inotropes. Commonly used intravenous anesthetics include isoproterenol, etomidate, ketamine, and midazolam. Because general anesthetics have absolutely no distant effects on the brain or memory, there is not much to worry about. However, anesthetics can have an effect on patients with cardiovascular disease. If a patient develops hypotension or hypertension during surgery, there is a risk of postoperative memory or mental impairment. Therefore, intravenous anesthesia has to be specially treated for special individuals.