Final answer:
During pharmacologic stress echocardiography, a drug is infused to simulate the effects of exercise on the heart. Commonly used drugs include dobutamine and adenosine, which increase heart contractions and blood flow respectively. This allows medical professionals to assess heart function and blood flow during stress testing.
Step-by-step explanation:
The drug infused during pharmacologic stress echocardiography is typically a synthetic drug that stimulates the heart to mimic the effects of exercise. One commonly used drug is dobutamine, which acts as a positive inotropic agent by increasing the strength of heart contractions. Another drug that can be used is adenosine, which dilates the coronary arteries and increases blood flow to mimic the effects of exercise on the heart. These drugs allow medical professionals to assess the function and blood flow of the heart during stress testing.