Heart scan safety question: should patients stop a common pill?

This study looked at whether patients should temporarily stop a common blood pressure medication (an ACE inhibitor) before getting a coronary angiography, which is a scan of the heart's arteries. The goal was to see if stopping the pill could help protect the kidneys from a rare type of injury that the scan's dye can sometimes cause. Researchers compared 44 patients who either continued their medication or stopped it for two days before the procedure.