hi surya thank you for the query I have gone through your query.. why serum creatinine elevated after CABG in your father case is it could be either due to the contrast dye used for angio graphy pre operatively or intra operatively because of hemodynamics which is relatively common in CABG...now what is of real concern is your father under going regular dialysis possibilities here of recovery are pretty much good surya ..medications you can use as prescribed by your nephrologist diuretics reno protective anti hypertensive drugs if your father has got hyper tension too to prevent the progression of the disease phosphate binders and calcium supplements as prescribed by nephrologist I can suggest dietary plan like salt restriction,not taking fruit juices and coconut water which has got the high potassium..and regular follow up with serum creatinine hope I have answered your query to your satisfactory level would welcome the follow up queries thank you regards DR Alekhya