Final answer:
During pharmacologic stress echocardiography, the sensitivity of ECG in detecting heart abnormalities increases, while the specificity may decrease.
Step-by-step explanation:
The sensitivity and specificity of ECG can change in pharmacologic stress echocardiography.
In pharmacologic stress echocardiography, a drug is used to simulate the stress on the heart, allowing for a more accurate evaluation of cardiac function compared to a resting ECG. The sensitivity of ECG in detecting heart abnormalities can increase during pharmacologic stress echocardiography, as the drug-induced stress causes changes in the heart's electrical activity. However, the specificity of ECG may decrease during this procedure, as there is a potential for false positive results.
Overall, pharmacologic stress echocardiography provides valuable information about the heart's function and can be used alongside ECG to assess cardiac health.