Which medication is commonly used as part of vasovagal management?

• A. IV atropine
• B. Epinephrine
• C. Heparin
• D. Aspirin

Answer: (A)

Vasovagal episodes slow the heart and drop blood pressure because of a sudden surge in vagal (parasympathetic) tone. The goal in acute management is to blunt that vagal input to the heart so the rate and perfusion can recover quickly. Atropine fits that need because it blocks muscarinic receptors on the heart, especially at the SA and AV nodes, preventing excessive vagal slowing. This allows heart rate to rise and blood pressure to stabilize, which is why IV atropine is commonly used in vasovagal management.

Epenephrine can support血 pressure in other shock states but isn’t routinely used for reflex syncope due to risks of tachyarrhythmias and less targeted effect on the vagal mechanism. Heparin and aspirin have no role in treating the reflex bradycardia and hypotension of vasovagal syncope; they’re relevant to thrombotic or ischemic conditions, not this scenario.