hello,my friend's dad is admitted.he is a pt of rhd..he has mitral stenosis with valve area of 1.1mm^2...he had episode of atria fibrillation 6 mths back...now he is complaining of belching(he passes air through his mouth every 20 sec and cannot talk because of that)...he was diagnosed A fib when he went for this complaint in hospital...he is taking digoxin,beta blockers,aspirin and now pantaprazole and itopride....his ejection fraction is 35%....how to explain his belching and how to treat it?