updated 07/09/2013 AT 7:45 AM ET
•originally published 07/09/2013 AT 7:50 AM ET
Randy Travis had heart surgery on Monday following his admission to a Texas hospital the previous day in critical condition, his sister-in-law tells PEOPLE.
“We have been told he has had surgery,” Teresa Traywick, the wife of Randy’s brother Ricky Traywick, said. “Our prayers are going out to him because my husband just had a heart attack last year, so it is in their family.”
The Grammy-winning country singer, 54, born Randy Traywick, is “suffering from complications of recently acquired viral cardiomyopathy,” a rep has said. Viral cardiomyopathy is a weakening of the heart muscles due to infection.