What is the percentage of cardiac uptake for sestamibi at rest?

The correct percentage of cardiac uptake for sestamibi at rest is indeed 1.2%. Sestamibi is a radiopharmaceutical used in myocardial perfusion imaging to assess blood flow and the function of the heart. When administered, 1.2% indicates the proportion of the administered dose that the heart tissue absorbs during a resting state. This number is significant in evaluating myocardial perfusion and helps clinicians determine if areas of the heart are receiving adequate blood supply.

Sestamibi's uptake is an important physiological parameter, as it can vary based on several factors including the patient's condition and the technique used during imaging. The specific value of 1.2% serves as a reference point for normal heart function, making it useful for comparison in patients undergoing stress testing and other evaluations. Understanding this uptake percentage is critical for interpreting imaging results effectively in clinical practice.