Doctors say Randy Travis, the country music singer, is improving in the hospital.

Randy Travis, a Grammy-winning country music artist, is responding to therapy for a heart illness that has kept him in critical condition in the hospital since Sunday, his physicians revealed on Wednesday.  

Dr. William Gray, director of cardiovascular services at Baylor Medical Center in McKinney, about 30 miles north of Dallas, said the virus was to blame for his symptoms.  

Travis' doctors spoke publicly for the first time on Wednesday during a televised news conference, but they did not provide any details about his treatment.  

Travis' publicist revealed on Tuesday that he underwent surgery to put a device in his heart to let it pump on its own.  

The 54-year-old artist, who lives in Tioga, North Texas, about 60 miles north of Dallas, had been in "excellent health until three weeks prior when he developed a viral upper respiratory illness," according to Gray.  

Gray reported that Travis was admitted due to cardiomyopathy and congestive heart failure. Cardiomyopathy weakens and enlarges the heart, making it harder to pump and potentially leading to heart failure.  

Travis was transferred to The Heart Hospital Baylor Plano for more specialist care when he was stabilized.  

"Since his transfer, his health has stabilized and he has showed signs of improvement," said Dr. Michael Mack, director of cardiovascular disease at Baylor Health Care System in Dallas."  

For more

Reminders For Each Zodiac Sign When Life Feels Like It’s Falling Apart