Prognostic value of coronary CT angiography in diabetic patients: a 5-year follow up study

This study evaluates prognostic value of coronary computed tomography angiography (CCTA) for long-term outcome to predict cardiac events in oligosymptomatic diabetic patients. A cohort of 108 consecutive diabetic patients without angina pectoris or known CAD, undergoing CCTA was included. 1379 consecutive patients without diabetes were defined as a control group. Coronary artery calcium score (CACS), segment involvement score (SIS) and the segment stenosis score (SSS) were documented. The end point was a composite of cardiac events defined as all-cause death, nonfatal myocardial infarction, or unstable angina requiring hospitalization. Follow up period was 66.0 ± 14.2 month. 98 % of initially enrolled patient were followed. During follow-up period 10 cardiac events within the diabetic cohort and 48 within the non-diabetic cohort were observed. Annual event rate in diabetic and non-diabetic patients was 1.74 and 0.64 % respectively. In diabetic patients a multivariate analysis showed significant prognostic value over Framingham Score for SIS with a hazard ratio (HR) of 2.98 (95 % CI 1.02, 8.72; p = 0.047) and SSS (HR 4.47, 95 % CI 1.21, 16.49; p = 0.025), while CACS did not add prognostic value in this cohort. Annual event rate was 0 % in diabetic patients with SIS = 0 and 3.9 % in diabetic patients with SIS ≥ 8. CCTA allows for improved risk prediction for subsequent cardiac events in oligosymptomatic diabetic patients.
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research