Hello doctor, My dad who is 51 years old undergone a open heart surgery on Nov 2008.He was normal after the surgery.But he is suffering from mild chest pain and some kind of giddinesses often(for the past three months).We consulted many cardologists and the results too were normal,still he is having same kind of problems.He is also having sugar,BP,stone in gall bladder..Should we have to consult any other specialists ? Whether these are symptoms of any other disease ?