Abstract : Coronary artery ectasia (CAE) is defined as a dilation of a coronary artery segment with at least 1.5 times the diameter of the adjacent normal segments. The Classification is usually based on shape and extent of involvement of the coronary arteries: an arterial aneurysm is usually reserved for focal dilatation, whereas the term ectasia is used to describe an elongated and extended widening of a tubular structure. Most patients with CAE have atherosclerotic heart disease (ASHD) concomitantly. We had done a retrospective analysis of our Cath lab database aimed at identifying the prevalence of CAE.CAE was diagnosed in 71 out of 3660 coronary angiogram reports analysed (1.93% of total angiograms). Based on index coronary angiography, 17 patients (23.94%) were classified as isolated CAE, and 54 patients (76.05%) were classified as mixed CAE and ASHD. Hypertension was the predominant risk factor present among (64.7%) patients in isolated CAE group and among (68.5%) patients in mixed CAE group. Chronic stable angina patients with TMT positivity (35 patients (49.29%). STEMI presentation was seen in 7 patients in 2(CAE& AHSD) and none in group 1(Isolated CAE). Similarly, ACS-NSTEMI was also more prevalent in the mixed CAE group, 8 patients in mixed group in comparison to 1 patient in isolated CAE group (P value= 0.00001). The majority of cases possessed a mixed CAE and ASHD, while isolated CAE was low. The most common coronary artery involved was the RCA, and diffuse morphology and type-IV ectasia was more frequent.