Question

Is sometimes injected into the patient's vein during a stress test and used as a marker that shows

blood flow to the myocardium.
Select one:
O A. Talcum
OB. Thallium
OC. Air
O D. lodine

Answer 1

Thallium-201 is the substance used as a marker during a stress test to show blood flow to the myocardium, aiding in the analysis of heart function and detection of coronary blockages.

Step-by-step explanation:

The substance that is sometimes injected into the patient's vein during a stress test and used as a marker to show blood flow to the myocardium is thallium-201. Thallium-201 becomes concentrated in healthy heart tissue, which allows medical professionals to use it in conjunction with other isotopes to study and visually analyze heart function and blood flow. Administering thallium-201 and subsequently performing a stress test provides valuable information about the cardiovascular system, particularly in revealing blockages in the coronary arteries.