What is the primary role of beta-blockers in patients undergoing imaging studies?

The primary role of beta-blockers in patients undergoing imaging studies is to manage anxiety and control heart rate. These medications work by blocking the effects of adrenaline on the beta receptors in the heart, which can lead to a decrease in heart rate and reduced anxiety levels. This is particularly beneficial in imaging studies where anxiety may lead to increased heart rates or discomfort, potentially affecting the quality of imaging results and patient cooperation.

Patients who experience anxiety may not be able to remain still, which is essential for accurate imaging. By providing a calming effect and stabilizing heart rate, beta-blockers help ensure that patients can undergo the procedure more comfortably and effectively. This role is especially pertinent in diagnostic imaging situations where the patient's physiological response to stress could interfere with the operational parameters required for optimal imaging.

The other options serve different purposes that do not align with the primary role of beta-blockers in this context.