Hello, It is a common practice for surgeons to look for underlying conditions like diabetes and heat disease before undertaking any procedure. They were probably doing your pre-operatiin check up and discovered qn abnormality in the EKG. They have rightly sought out opinion from a cardiologist.As far as the diagnosis of an infarction is concerned, it would only be wise to comment after looking qt the EKG. Having a heart attack without symptoms is not common in old age and whereas smoking and diabetes increase the risk of heart disease, heart disease can occur without these as well. Infact male gender is itself a risk factor. You should expect further evaluation of your heart once you go to the cardiologist. Especially an Echocardiography and may be an agiography. Additiinally he might prescribe a few medicines to prevent further issues. Hope that answers your question.