My Husband Had Two Cardiac Stints Put In Yesterday Afternoon-

My husband had two cardiac stints put in yesterday afternoon- stayed in hospitakl one night and was released today feeling pretty good. however, tonight, he is experiencing chest pressure just a 1/2 inch above where his pain was before the stint. he is not short of breath but he is sweaty. he took a nitroglycerin and pain went aWAY.....is it normal for this to happen after stint placement? he had 2 in right artery. Thank you