Lord, please heal Mama

Mama went to Kch for a heart by-pass orperation recently. Her operation was finished and OK. But, suddenly, the doctor came and told my mum that her heartbeat stopped for a while but, sooner later, it came back again beating normally. They worried that at the period of no heart beat would affect her brain and kidney. So, they let her sleep until the next day. She woke up the next morning. Everything was fine and she doing fine. However, during the afternoon, my mum told us that her kidney isn't functioning normally. At that time, we were all very worried and in tensions. Praying hard to the Lord to ask for healing. The doctor scanned through her heart and noticed that it was still bleeding. So, we made a conclusion that it was the reason why her kidney wasn't functioning normally. But now, her heart is beating good and everything is good but, her kidney isn't functioning well. So, she is currently using the dyalisis.
Please pray for her. Pray that God will strenghten her faith in Him and heal her.
Tnx!