This kind of cardiac complication of diabetes
is never to be treated on your own. Please make sure this patient is taken to a Cardiologist for further evaluation such as ECHO and Treadmill test and if Cardiologist advises angioplasty
to be done. Never ever think of medicine like Digoxin
to be given to the patient on your own as Digoxin can be highly poisonous. The patient has to control blood glucose, control blood pressure, weight gain and the urine microalbumin
secretion to avoid further chances of damaging the heart tissues. so please make sure the patient is shown to a good Diabetologist/ Endocrinologist
, a Cardiologist and an Ophthalmologist also to rule out retinal damage the way kidney is affected.
I hope you got an idea. All the very best.