No announcement yet.

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

  • Filter
  • Time
  • Show
Clear All
new posts

  • 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.


      • #5
        FYI, it seems that the test I received was CTA and no CAC score was given. This is the result of the test, in addition to several scans. Seems good. BTW, I asked and the doctor at the test said it was a 16 slice machine.

        Result of Checking:
        The right coronary artery was opened in the right sinus,
        The right coronary artery trunk and its branch wall were regular, no obvious calcification, plaque shadow, and no obvious stenosis in the lumen.

        The left coronary artery was opened in the left sinus,
        The left main trunk, the left anterior descending branch, and the circumflex wall. There was no obvious calcification and plaque shadow, and no obvious stenosis was found in the lumen.

        The coronary artery distribution is right dominant.

        There was no abnormality in coronary CTA.


        • fatmax
          fatmax commented
          Editing a comment
          16-Slice CT Scanners are not considered suitable for cardiac studies.