Effect of Continuing vs. Discontinuing ACE Inhibitors on Renal Function After Coronary Angiography

Participants in this group will continue taking Ramipril at their usual dose before, during, and after the coronary angiography. The objective is to evaluate the renal effects of uninterrupted ACE inhibitor therapy during contrast exposure.

Participants in this group will stop taking Ramipril 48 hours before the angiography procedure and resume it 72 hours after. This intervention is used to evaluate whether temporarily withholding ACE inhibitors reduces the risk of contrast-induced nephropathy.