Summary : Left ventricular function is an important predictor of long term outcome in patients with coronary artery disease and may influence clinical management. We have studied the left ventricular function in 79 patients, 66 males and 13 females, all with a normal resting electrocardiogram presented to our department with suspected or documented coronary artery disease. Their age ranged between 28 and 71 years for the male patients and between 48 and 62 for the female patients. Records of left ventricular individual functional parameters were obtained during cardiac catheterization. All results were statistically analyzed and the findings were as follows: The ejection fraction was normal in 76 and impaired in 3 patients. No relation could be elicited between the LV systolic function and the number of the diseased coronary arteries. Smoking was on top of the list of the known risk factors in our patients. Hypertension was of equal importance in all ages and in both genders. It was the commonest concomitant disease in our patients. Diabetes was also an important risk factor particularly in older patients. Obesity was of special importance in female patients and male patients aged below 55 years. Hyperlipidemia and history of previous myocardial infarction came at the end of the list. Our results matched well with the results published by other authors, and confirmed the hypothesis that normal resting electrocardiogram could preclude the need for left ventriculography in patients with coronary artery disease