Answer: Do coronary angiogram for all patients who had suffered from an acute myocardial infarction* ( Forget about all those mulitpage ACC/AHA guidelines !).
For an interventional cardiologist , it is often considered a crime to follow a conservative approach !
*Caution : This one line guideline is not based on scientific fact but reality based . Ideally one should identify high risk subsets among the patients who had an AMI .Patients who had complications during the MI get immediate CAG. Others need a focused LV function asessment , pre discharge sub maximal excercise stress test or perfusion studies .But this concept has been virtually replaced by pre discharge coronary angiogram for all , in many of the centres in the world.
Dr.S.Venkatesan MD 
