I am diabetic n had undergone cabg in 2004,also sometimes i awakes at night(sleep problem).From 2 months i feels that after evening i feels my pulse gets low (52-62) n even skips sometimes,i also feels weakness n laziness. Met cardiologist n ecg says SINUS RHYTHM with marked arrythmia with IST degree AV block OTHERWISE NORMAL,after that TSH n DOUBTAMINE ,both were normal. My ques is which speciality should i met so that my problem gets solved.