This domain has great value. You have a number of options for how you would develop it. It could be a resource for cpr trainers, for connecting people to those trainers or a site with information for getting certified, recertified, etc.
It's short, it's about as good as it gets for what it represents.
For somebody sitting on it (a domainer), you're probably looking at mid xx. But if you develop it or get to that end user, you're definitely looking at high xxx.
Especially with the new emphasis on hands-only cpr. Good pick, hope you didn't spent much and make some money on it.
One downside, it looks weird without the capitalization you gave it. cprreview.com. Looks like a typo. It's definitely the right name, though.