Background & Objectives: Type 2 diabetes is a major cardiovascular risk factor such as HTN, HLP and smoking. A primary diabetic cardiomyopathy represents a high risk factor for heart failure in the absence of ischemic, valvular and hypertensive heart disease in the diabetic population. CAD is more common in diabetic patients and it is almost asymptomatic.

  Unquestionably, an early detection of LV damage and CAD is a major goal for the prevention of cardiac disease in the diabetic population.

  Methods: This study was done as Cross-Sectional method. The study sample consisted of 40 patients with type 2 diabetes mellitus without hypertension and cardiac symptoms (mean age 47 years) who recourse to diabetes clinic of Ardabil Imam Khomeini Hospital during 2009-2010. Left ventricular (LV) function was studied by echocardiography and exercise test using Bruce protocol. Data from the patients were collected and analyzed using SPSS 17 software.

  Results: All studied cases had a normal systolic function. 22 cases (55%) had diastolic dysfunction and 8 people (20%) had a positive stress test, which all had diastolic dysfunction too.

  Conclusion: This study showed that an impairment of left ventricular diastolic function occurs early in the natural history of diabetes mellitus and CAD is more common in diabetic patients with diastolic dysfunction.