Randy Travis has undergone heart surgery after being hospitalized on Sunday (July 7) due to complications from a viral cardiomyopathy. His sister-in-law says the family has a long history of heart troubles.

Teresa Traywick tells People that the singer had surgery. "Our prayers are going out to him because my husband just had a heart attack last year, so it is in their family," the wife of Ricky Traywick says. Travis' real name is Randy Traywick.

"Their mother passed away at an early age with her heart, so it is like these boys are following right in their footsteps," she adds.

More details about Travis' weekend hospitalization have been revealed. TMZ cites an unidentified source, saying Travis was airlifted to a Texas hospital after a few days of deteriorating health. What he thought was a cold turned out to be pneumonia, and he's gone downhill since.

Travis' Wednesday (July 10) performance in Deadwood, S.C. has been canceled. There is no word on scheduled performances for this weekend.