Heart health is needed for diving. Give it the attention and priority it deserves before you dive. When in doubt, don't dive. Check with your physician to make sure you are ready to dive.
Earn Valuable Non-Corny Skills By Training to Be a Rescue Divers
The best rescue diving classes will also provide you with Emergency First Response (EFR) training in First Aid & CPR. Not all rescue diving classes offer EFR training. Make sure you sign up for a rescue diving class which provides EFR training. This training combined with the other training you will receive will make you a more prepared diver.