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

The correct choice for performing a gated equilibrium ventricular function study is human serum albumin labeled with technetium-99m (99mTc). This radiopharmaceutical is commonly used in nuclear medicine due to its ability to provide clear imaging of cardiac chambers and assess ventricular function accurately.

When conducting a gated equilibrium study, it is essential to use a radiopharmaceutical that distributes well within the blood pool, allowing for the assessment of blood volume and movement during the cardiac cycle. Human serum albumin labeled with 99mTc achieves this effectively because it remains in the bloodstream and can be visualized using specialized gamma cameras. This characteristic makes it suitable for determining parameters such as ejection fraction and wall motion.

The other options listed, while they may have other clinical applications in nuclear medicine, do not fit the criteria for a gated equilibrium ventricular function study. For instance, pentetate and pyrophosphate are generally used for different types of scans and not specifically for evaluating ventricular function. Medronate, while it can be used for bone imaging, also lacks the properties necessary for assessing cardiac performance in this context.