It seems by your description and the EKG reading that the heart attack
or infarct is old or age indeterminate. However, in the setting of recent symptoms it is concerning and he will likely need more testing. At a minimum, he should be taking one baby aspirin
81 mg daily (can buy over the counter), and hopefully he was provided with nitroglycerin
tablets in the ED or wherever he was seen for recurrent episodes of chest pain
. Don't hesitate to visit the ED or call an ambulance if he has further episodes of chest pain.
Hope this helps,
Mayo Clinic Rochester