Heart attack signs you shouldn't ignore- Co Down man's warning after suffering 'series of large heart attacks' John underwent heart surgery which saved his life, but now he's speaking out to urge others not to ignore signs John was into running, cycling and the gym prior to his heart attack Never miss a thing from Belfast and beyond - sign up for FREE newsletter direct to your inboxInvalid EmailSomething went wrong, please try again later. Subscribe When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice.