Comparison of Outcomes of Diseased Coronary Arteries Ectasia, Stenosis and Combined

BACKGROUND Coronary artery ectasia (CAE) is a localized or diffuse abnormal dilatation of coronary arteries. Controversy still remains about its cardiovascular events rate, prognosis, and etiology. Adverse effects of CAE coinciding with coronary artery stenosis (CAS) (and in isolated form) are unclear. OBJECTIVES We aimed to investigate the cardiovascular event rate of CAE in comparison to 'CAS only', and comparing their etiology. PATIENTS AND METHODS This cross-sectional study was conducted on 200 patients between May 2011 and June 2012. Of them, 40 had CAE (case group) and 160 had only CAS (control group). Patients with CAE were divided into 2 subgroups according to the absence (E1) or presence (E2) of CAS. They were followed up for at least 6 month for cardiovascular events, including death, unstable angina and myocardial infarction (MI). Finally, we compared findings in CAE, CAS, and E1 and E2 subgroups and evaluated the relationship between severity of ectasia (1-1.5 times, 1.5-2 times, and > 2 times) and CAS. RESULTS Hypertension (HTN), dyslipidemia (DLP), and male sex were matched in both groups without significant difference. Cigarette smoking (C/S) was significantly higher and diabetes mellitus (DM) was significantly lower in CAE compared to CAS patients. A subgroup of CAE patients with CAS (E2 subgroup) had significantly higher mortality rate than isolated CAS (P = 0.043). MI was seen in several isolated CAE patients (E1) subgroup. Severity of ectasia showed no significant relationship with CAS. CONCLUSIONS Presence of CAE in patients with CAS increases its cardiovascular event rate. Isolated CAE is not a benign finding and MI can occur. Risk factors of CAE are similar to CAS, but C/S is more associated with CAE than CAS. DM is seen in CAE patients less than CAS.