1. In cardiology, PET/CT imaging provides measurements of blood flow, myocardial perfusion, and myocardial viability. These measurements are used to detect:

   1. Coronary artery disease, which is characterized by areas of decreased blood flow, decreased perfusion, or both

   2. Transient ischemia (both stress and rest images are performed)

2. A high rate of glucose consumption is required to meet the energy needs of the heart. Low glucose metabolism in areas of decreased blood flow indicates nonviable myocardial tissue.

Pretest Patient Care

1. Instruct the patient about the purpose, procedure, and special requirements of PET/CT imaging. Refer to standard nuclear medicine procedures pretest precautions.

2. Explain that an IV line may be necessary. Cardiac viability patients require fasting and may be given glucose or insulin as part of patient preparation. Tell the patient that smoking and medication restrictions are required before imaging. Consult with the referring healthcare provider or the nuclear imaging department.

3. Tell the patient that it may be necessary to place ECG leads on the chest.

4. Refer to standard NMI pretest precautions.

5. Follow guidelines in Chapter 1 for safe, effective, informed pretest care.