A gated equilibrium ventricular function study can be performed with which of the following 99mTc labeled tracers?

A gated equilibrium ventricular function study is a nuclear medicine procedure used to assess the function of the heart and its ventricles. This study requires a tracer that can provide clear imaging of the heart during its diastolic and systolic phases.

Human serum albumin, when labeled with technetium-99m (99mTc), is ideal for this type of study because it remains in the vascular compartment long enough to capture detailed information about the heart's function at rest. The albumin tracer provides good image quality and allows for the measurement of parameters such as ejection fraction and wall motion. The properties of 99mTc-labeled human serum albumin make it favorable for observing cardiac dynamics over time in a resting state.

The other tracers mentioned, such as pentetate, medronate, and macro-aggregated albumin, have applications in nuclear medicine but are not typically used for gated equilibrium studies. For example, pentetate and medronate are usually employed for myocardial perfusion studies, focusing on the blood flow to the myocardium rather than overall ventricular function. Macro-aggregated albumin is utilized primarily in pulmonary ventilation studies. Therefore, these tracers do not serve the specific requirements of a gated equilibrium ventricular function study