In the US there's an extreme attitude of "I'm not paying for someone else...", and any sort of preventative care, like a heart score test, would fall into that category. This attitude is grounded on the personal responsibility mindset, that every person is responsible for taking care of themselves. So, for the 800K people that had heart attacks, the attitude in the US is largely, "They should've been proactive on their own, gotten the $100 test. Their heart attack is their own fault."