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Coronary Artery Calcium (CAC) vs CT angiogram (CTA)

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  • Coronary Artery Calcium (CAC) vs CT angiogram (CTA)

    I thought I scheduled a CAC for next Friday. I was worried that I had the wrong test scheduled since I'm trying to do all of this in Chinese and the test center insists to have someone accompany me because of risk of adverse reaction to medication. All of the stories I read about CAC is that it is a 5-10 minute procedure with no medicine so I was confused.

    This article may have the answer that what is scheduled is actually a CTA instead of CAC.

    Is the CTA a more thorough version of the CAC and I should just go ahead with it or should I cancel that test and try and really do a CAC?

  • #2
    CTA is invasive (needles and medication). CAC is not. First get a CAC and ask for a printout that has volume and density as well as the score. Takes 10 minutes, no muss no fuss. Let a cardiologist tell you to get a CTA if he thinks you need it. It's much more expensive that a CAC. Make sure the CAC machine is modern and has at least a 64-slice. Do a Google search.

    See this regarding volume and density:
    Last edited by fatmax; 05-10-2019, 05:48 AM.


    • sthubbar
      sthubbar commented
      Editing a comment

      Thank you. That's what I thought.

  • #3
    Thanks. Good points.


    • #4
      I talked to a doctor at the hospital today and it seems that the CAC score is only available combined with a CTA, so a dose of Iohexol contrast agent is required.