Does having an angiogram show all my arteries?

Not all of them... An angiogram is an xray where a contrast material (dye) is injected into specific arteries to look for abnormalities and blockages. But they look at specific areas with a single study. For example, you might have a cerebral angiogram if stoke is suspected, a coronary angiogram if your doctors are concerned about the bood vessels serving your heart, etc.