Presencia de enfermedad coronaria obstructiva en pacientes con SPECT negativo sometidos a coronariografía por tomógrafo de 64 canales

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.