A Crucial Prayer Request

We have been so uplifted by your prayers for us during this time with my dad. He has had a fairly good week as far as his responses toward us. The Lord is answering our prayers concerning a couple of specific areas we have asked you to pray about.
1. Dad is no longer on dialysis. His kidneys are functioning at 24% and his creatnine level has dropped significantly. Praise the Lord! We are so thankful that He has met Dad's needs in the area of his kidneys.
2. He has been responding to the medical staff. This was a huge matter of prayer for us to help determine where Dad will be placed next. This is still not completely a settled matter, but his responses have definitely increased by the power of God! =)
We are depending highly on your prayers on our behalf, and so we bring you another crucial prayer request. Over the last week or so, Dad's heart rate has been very erratic, due to a malfunctioning of his pacemaker. It has not been functioning well at all and is having a very difficult time picking up the needed electrial signals that keep the heart beating well. The cardiologists are very concerned and say that this is a crucial thing for Dad's heart. It cannot be left alone, and the problem will not resolve itself. Our only option also puts him in a very crucial position. Dad needs a new pacemaker, but going into surgery is very dangerous because of the recent coma he is just starting to come out of. We need prayer for wisdom as we choose the doctor that will perform the surgery. We also ask you to pray for his safety through the surgery. His heart is very unstable at this time, and he could very easily have another cardiac arrest. Thank you so much for your prayers for my dad and our family. The Lord has been so good to us and we are trusting Him.