My dad had a double bypass two years ago and has recently been suffering with shortness breath, tireness, burping and palpatations. He states that he feels low with no energy and a feeling of an upset stomach , although he has had no vomoting etc. He is currenlty on Warfarin , beta blockers, water tablets and aspirin . He has no chest pain but is finding daily activites harder due to the tiredness and shortness of breath. Do you think that my dad be having symptoms of heart failure