Studs in heart surgery?

I suspect that the person asking the question means a "stent." A stent is usually a fine metallic device used to keep open a section of the coronary artery that is narrowed by atherosclerosis. Some stents are coated with material that is slowly released to prevent local clot formation and interference with blood flow.
Stents are rarely placed at the time of cardiac surgery; they are usually delivered into the artery by a catheter system that is entered via an opening in the groin or antecubital area of an arm.
Please be aware that I am unable to diagnose medical conditions online.

Patient of age 58 had a minor chest pain at the age of 45 and minor changes in ECG where noticed and know again at the age 58 is suffering from pancreatic and during medication got chest pain twice and got relieved by having tablet sorbitrate , there were fresh changes noticed in ECG what should be the next step .Patient has family history, Should ENIOgraphy be done. How serious the attack is or it is just an enzina pain