PONTIAC, Mich. (AP) _ Two men convicted of robbing a man in 1983 now face murder charges after a pathologist ruled the victim's fatal heart attack was caused by injuries he suffered in the robbery.

Oakland County Prosecutor L. Brooks Patterson said first-degree murder warrants were issued Monday and served at the State Prison of Southern Michigan at Jackson against Christopher Bush and Reginald Harding Jr.

Bush is serving a life sentence and Harding is serving 22 to 60 years for armed robbery and assault, Patterson said.

In that 1983 robbery, Jeffrey Dudley was beaten, shot and left for dead. Since the attack, Dudley had worn a pacemaker and had underwent surgery eight times.

Dudley, 22, collapsed June 28 during a basketball game after he tried to stop a shoving match between two players.

''In the same situation with a normal heart, this man would be alive today,'' Dr. Sawait Kanluen of the Wayne County Medical Examiner's office ruled last month.