MCQ – 71354

Correct Answer � C Explanation

Ans:C.)Myocardial Perfusion Scan.

Myocardial Perfusion Scan(Sestamibi)

• The principle is based on myocardial tissue labeling, usually comparing stress and rest situations.
• Until recently thallium was the preferred radionuclide agent but characteristics of thallium meant higher radiation doses and anatomically poor images.
• The more recently introduced technetium agents (e.g. sestamibi) allow higher image quality studies to be achieved but separate stress and rest studies must be performed on different days.
• The imaging technology for myocardial scanning usually involves the tomographic acquisition of data using a rotating gamma camera and electrocardiographic gating.
• The slices produced in these views can be displayed in several ways for ease of interpretation and quantitation, the `bull’s eye’ view is a common way of demonstrating the full extent of the left ventricular myocardium.
• The most common indication for radionuclide scanning is the assessment of myocardial perfusion and viability.
• This can be a first-line technique for the diagnosis of coronary artery disease, as an adjunct to coronary arteriography or as a specific decision-making tool in the planning of coronary interventions.