What is the rescue agent for Lexiscan, adenosine, and dipyridamole?

The correct response indicates that 250 mg of aminophylline serves as the rescue agent for Lexiscan, adenosine, and dipyridamole. This is important as these medications are vasodilators often used in cardiac stress tests and can lead to significant side effects, including bradycardia and hypotension. Aminophylline, a methylxanthine derivative, acts as an antagonist to these agents, effectively reversing their effects on the cardiovascular system.

In clinical practice, having the appropriate dosage of aminophylline available is critical for patient safety, particularly in instances where cardiovascular challenges or negative reactions occur. Through proper dosing, healthcare providers can mitigate adverse effects while ensuring the continuation of diagnostic procedures or treatment. The selected dose of 250 mg is consistent with established protocols for using aminophylline in such scenarios, reflecting the need for an effective rescue agent in case of complications. The other choices suggest either insufficient or excessive amounts, which could lead to inadequate response or unnecessary complications, respectively.