Randy Travis' heart issues which landed him in the hospital a week ago ... are NOT the result of drug or alcohol abuse, according to his doctors.
Doctors at the Texas hospital where Randy is getting treatment just said -- based on images of Randy's heart -- it's more likely that a family history of cardiomyopathy is to blame for his ongoing heart trouble.
They also said the country music star has been using a ventilator -- but he's improving and they hope he'll be breathing on his own soon.
Randy was airlifted to the hospital on July 8 -- and suffered a stroke last week while getting treatment.
Gallery GettySee also
Randy Travis -- Get Well Phone Call From CHUCK NORRIS!!!
Randy Travis -- Suffers Stroke
Randy Travis -- 'Signs of Improvement' ... Doctor Says
ncG1vNJzZmivp6x7tbnZZ5qopV9nfXJ%2FjmluaGllZL%2BiusOyZK2qkau2tHnSramoo5Vitaat0a1knaGjmq60sY4%3D