My best friend, who was like a grandfather to me, had his first stroke even before I was born - he outlived a second one and passed away some 20 years later, having continued to fully live his life.
These are horribly scary moments, yet I'm glad to know he's alright. Just don't let fear dictate his next steps - doctors can be true experts in that, and "fully healthy" is many times the opposite of "living one's life to the max".