Prayer request

We found out today that my Grandpa Liabenow (my dad's dad) had a heart attack. He had a pretty major one back when I was a junior in high school. So, that was eight years ago. I don't know much, but last I heard, he was in the ER and they're going to have to run tests. They don't know how serious his condition is. I might end up going up there if it's serious; otherwise I'll probably stay home. Just please pray for wisdom for the doctors, and for safety and healing for my grandpa. He's a gentle, kindhearted man. I hate for him to be in pain.

Thanks.