Ultra-fast or external beam CT is not an alternative to a cardiac cath and only identifies calcifications in the coronary arteries. Calcification does not correlate directly with significant blockages so the information obtained from a CT scan is often not clinically relevant. If you have doubts or concerns about undergoing a cardiac cath, then I suggest that you speak with your cardiologist and discuss these issues. Also, please remember that you do not have to undergo any procedure that you are unwilling to give consent to. I hope you find this information useful.
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