A technique of injecting a dye into the vascular system to outline the heart and blood vessels, a catheterization can aid in the visualization of any blockages, narrowing, or abnormalities in the coronary arteries.

Smooth and regular outlines on the x ray indicate normal coronary arteries.

What I think you are asking is what is a heart catheterization. It is a medical procedure, sometimes also referred to as a coronary angiogram, A test to check the blood flow and pressure within the heart and the vessels that provide oxygen to the heart ( coronary arteries)

electrocardiogram, stress tests, cardiac catheterization, imaging tests such as a chest x ray, blood tests

cpt code for left sided heart cath with selective coronary angiography and left ventriculography ?

I have found that the left sided heart cath with selective coronary angiography cpt code is 93452 this also includes the ventriculography