Check this link and scroll down towards the bottom. You can see a comparison between the different models.Absolutely! I'm already under close care from doctors. I appreciate the concern. I'd really like a watch just to monitor my own heart rate for my knowledge as I'm starting to get back to working out. I think it will help me stay in a range that is set by my doctor.

Apple Watch SE
Apple Watch SE has powerful connectivity, fitness, health, and safety features and is available in three case colors. It’s a better value than ever.
www.apple.com