Which inhalant anesthetic has rapid induction and recovery times and minimal cardiovascular depression?

• A. Sevoflurane
• B. Desflurane
• C. Isoflurane
• D. Halothane

Answer: (C)

Inhalant anesthetics differ in how quickly they reach and wear off, and in how they affect the heart and circulation. The goal is fast enough induction and recovery while keeping the cardiovascular system stable. Halothane is known for causing significant myocardial depression and can drop blood pressure, so it’s not ideal when minimizing cardiac effects.

Among the remaining options, isoflurane provides a reliable balance: it tends to depress the heart less than halothane, helping preserve blood pressure and heart rate, while still offering smooth anesthesia with predictable recovery. While desflurane and sevoflurane can achieve very rapid induction and quick recovery, desflurane can provoke airway irritation and sympathetic activation (which can raise heart rate and blood pressure), and sevoflurane, though rapid and generally well tolerated, may not offer the same level of cardiovascular stability in all situations. Therefore, iso­flurane is the best match for rapid enough induction and recovery with minimal cardiovascular depression in this context.