You have a problem here,I am in the same position. Insurance companies won't insure you for a pre-existing medical condition. they will give you insurance for a holiday with the provision that you aren't covered for illnesses retated to your heart condition. I rang around several companies and was told the same. You may be able to get someone to cover you for this but the premiums will be astronomical. A few months ago a few family members went on holiday. I covered us all on Direct Line, with my condition disclosed, they came in the cheapest