A 72-year-old woman presents to emergency with sub-sternal chest pain. The pain increases when walking her dog around the block. She has a past medical history of hypertension and diabetes mellitus type II. A sublingual medication is prescribed to decrease pain during episodes. Which of the following is the most likely explanation for the effectiveness of this pharmacologic agent?
Arteriolar dilation
Decreased chronotropy
Decreased breakdown of cAMP
Increased production of cAMP
Venodilation
