. . . If, on the other hand, the form asks to disclose any medical issues, then I find it problematic to leave that blank. Known medical issues help rescuers/first responders to do their jobs. Putting first responders at greater risk is unacceptable. . . .
Wasn't this discussed either upthread or in another recent thread about medical waiver forms? It was argued--persuasively to me at least--that first responders may not have timely access to the waiver form you gave the dive shop. There's something of a paradox here: Because it is well known to dive ops that many divers do not accurately complete those forms, a dive op's first reaction in an emergency probably isn't to dig the diver's form out and rush down to the dock with it to meet the first responders. So you go to all the trouble of listing your medical history, and nobody pays any attention to it because they don't trust it to be accurate. I think the better approach for someone who has a medical condition that genuinely might be useful for first responders to be aware of would be to wear a medical alert bracelet/tag. Your doctor can determine what information, if any, would be useful to provide to first responders in that manner.