Doctors have concluded the Rev. Jerry Falwell (search) does not suffer from congestive heart failure or coronary artery disease, Falwell's son said Sunday.

Jonathan Falwell (search) said doctors made the determination Friday after conducting tests on his father.

"He is doing very well," Falwell said prior to delivering the sermon at Thomas Road Baptist Church (search). "He is walking around the hospital and is strong. His heart is strong."

The elder Falwell was listed in fair condition Friday and was able to exercise for the first time by walking the halls of Lynchburg General Hospital.

"I will be here a while yet," he said. "I don't know exactly what the doctors have in mind."

The 71-year-old founder of the Moral Majority and Liberty University had stopped breathing when he entered the hospital March 28 and had to be resuscitated.

Doctors initially thought he suffered from congestive heart failure, although they did not believe he had a heart attack.

It was Falwell's second hospitalization in recent weeks. He left the hospital March 4 after nearly two weeks of treatment for a viral infection, several days of which he spent on a ventilator.