Resumen

PARRA B, César et al. Obstructive coronary artery disease in patients with negative SPECT undergoing coronary angiography with a 64-slice CT angiogram. Rev. chil. radiol. [online]. 2011, vol.17, n.2, pp. 77-79. ISSN 0717-9308.  doi: 10.4067/S0717-93082011000200005.

Objective. To evaluate the presence of obstructive coronary artery disease (OCD) in patients with negative SPECT undergoing 64-slice coronary CT angiography. Material and methods. From July 2007 to January 2010, patients with negative SPECT undergoing CT angiography were assessed. We used a Philips Brilliance 64-slice CT scanner and low osmolality iodinated contrast. Coronary arteries were divided into 16 segments and the presence of OCD (lesion> 50%), non-obstructive coronary disease (lesions <50%), or absence of coronary disease were evaluated. Results. From a population of 447 patients undergoing coronary angiography, 52 patients with negative SPECT were included in the study. The mean age was 60 years, and 67% corresponded to female patients. We observed 13 patients (25%) with OCD. Percentages of arterial anomalies were as follows: 92%, anterior descending artery; 53.8%, right coronary artery; 46.1%, circumflex coronary artery; 23%, lateroventricular coronary artery; 15.3%, posterior descending coronary artery; 7.7%, diagonal coronary artery. No lesion was found in the left coronary artery. Conclusion In our analysis, 25% of patients with negative SPECT showed significant obstructive lesions.

Palabras clave : Coronary CT; Coronary obstruction; Ischemic heart disease.