Can exclusions in hospitalisation plan be removed if one is no longer treated or on medication for the condition?

Unlikely. If you currently have a H&S plan, I would stick to it. Heart conditions are not easy to get covered for, and most insurers generally exclude congenital conditions.

Hi anon, sorry to hear about your condition.

Hole in the heart is rather difficult to clear. Underwriters are pretty strict with this particular condition. I've tried before but failed repeatedly for my clients. Generally, certain congenital conditions from birth would stick with you for life. I'd encourage you to hold on tightly to more emergency savings and create a separate fund for future uses should there be complications to the heart that cannot be covered by your H&S policy.

Good luck!