Unstable angina- because cardiac biomarkers are normal .
If cardiac biomarkers would have been raised, then the diagnosis would have been NonSTEMI
metoprolol also increases o2 supply by decreasing force of contraction and aspirin also help to increase the blood flow as we know this is very old patient so chances of mild atherosclerotic plaque may be there.
Acs spectrum ( unstable angina ) .
Unstable angina
( No marker and st depression)