You don’t say how old you are, but there are tests that will tell you whether you have a big problem. CAC is in order, and calculate the density like this (if you search this site for The Arrow you will find the entire post, I’m tech challenged or would give it to you here):
In order to calculate what I call your true risk, you’ll need your Agatston score, which is the score you’ll be given with your test. You’ll need the plaque volume, which is usually included in the printout you get. You’ll need the thickness of the CT slice they took of your heart. This is included in about a third to a half of the reports I’ve seen from various centers. It will be either 3mm or 2.5mm.
You can tell which it is by the time it took you to get the CAC scan. If it took ~ 45 seconds to one minute, then you were scanned by an EBT machine and your slice thickness is 3mm. If your scan took 35 minutes to an hour, then you had a helical scanner and your slice thickness is 2.5mm.
Once you have that in hand along with your scan, you’re ready to roll. Here are the steps.
- divide the volume score by the slice thickness
- take that number and divide it into the total calcium score
- look up that number on the chart below (Table 2 in the JAMA paper).
Let’s take a look at a scan that a friend of mine sent me.
I happen to know this scan was done on an EBT scan, so the slice thickness is 3mm.
The total calcium score (the Agatston score) is 476.65. We can see that the volume score in the middle column above 401.73.
Dividing the volume score by the slice thickness (401.73/3) gives us 133.91.
Dividing that number into the calcium score of 476.65 (476.65/133.91) gives us 3.56.
When we look up 3.56 on the table below, we find this person to be in the 4th quartile (he/she falls into the 3.19-4.0 range), which means he/she has low risk, despite his/her high Agatston score.
I just had a friend come to me panicked about a calcium score he had received of 3,000, which is the highest I’ve ever seen. When I ran his calculations for him, I feared the worst, but he came in at 3.30, which puts him in the 4th quartile.
Before he came to me, he had already undergone a thorough workup by his cardiologist, which included a stress echo. Which is the first thing that needs to be done in the face of a huge calcium score. His was perfect.
There are ways to measure soft plaque too, but I saw this video and it’s within my budget so give it a try:
Good Luck,