Angiogram has risk including blood clot.
Following is a response I found here from a cardiologist.
“ I am a cardiologist and got my calcium score just casually as I was giving a seminar on it to local drs some four years ago. It came 746! No symptoms, no risk factors, marathoner. Got stress nuclear tested. Just on statins/ aspirin. As an interventional cardiologist myself, I see most patients of heart attack have soft non calcified lesions. Moreover statins tend to increase the calcium score. So you know that it’s not as simple!
I don’t think it needs to be ever repeated. Just avoid over thinking and over treatment. “

I hope this will give a piece of mind.