Studies showing the exercise test responses among Black diabetics are few with a dearth of data on patients with hypertension and diabetes,quite common among Nigerians. This study looked at cardiac function including systolic and diastolic parameters by echocardiographic method, in patients with diabetes, considered the effect of DM alone and DM and hypertension on these parameters as well as looked at those echocardiographic parameters that may be used to predict exercise capacity in this population of patients.