Christians are being urged to pray for the health of Bill Graham's granddaughter, Rachel-Ruth Lotz. 

In a Facebook post, the late evangelist's daughter, Anne Graham Lotz explained Rachel-Ruth had been taken to hospital on 8th January after she suffered a heart attack. 

 "Multiple times I have prayed Psalm 73:26 for people who were struggling with heart issues: My flesh and my heart may fail, but God is the strength of my heart and my portion forever.

"I am now driving the stake of my faith down deep into this promise for my daughter, Rachel-Ruth. She was rushed to the hospital on Saturday night with a heart attack, followed by a catheterization," she wrote. 

Graham Lotz explained doctors have described her daughter's condition as a "broken heart syndrome" as they have been unable to find the cause of the heart attacks. 

Rachel-Ruth is expected to stay in hospital for several more days so doctors continue to run tests. 

"I am urgently asking you to join my family in praying for Rachel-Ruth.  Please pray for her heart to stabilise; for accurate diagnosis and treatment; for the doctor's supernatural wisdom; for peace and comfort for all of us," Grahm Lotz continued. 

She concluded her post with a verse from Psalm 103.

"Bless the Lord, O my soul. Who redeems your life from destruction, Who crowns you with lovingkindness and tender mercies." 

This is not the first time Graham Lotz has appealed prayers for healing. In July last year, her urged people to join in her prayer for her son Jonathan as he was hospitalised for Covid-19 complications. 

"PRAISE GOD!!! Praise our prayer-hearing, prayer-answering God!" Graham Lotz wrote on Facebook at the time, celebrating his son's recovery.