My pulse rate is irregular n I think due to that I feel giddiness. I underwent angiography test, echography and what not yet my pulse beating is not regular. Do I need bypass surgery? My test results showed normal except "mild concentric. N sr. Cardiologist says nothing could be found. My bp is 140/70 (last) n I am taking coversyl 4/5 a/m.plus vertin16. I mean diabetic too. So do I need surgery to bring an end to this problem?