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Rev. chil. radiol ; 17(2): 77-79, 2011. ilus, tab
Article in Spanish | LILACS | ID: lil-603053

ABSTRACT

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 percent), non-obstructive coronary disease (lesions <50 percent), 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 percent corresponded to female patients. We observed 13 patients (25 percent) with OCD. Percentages of arterial anomalies were as follows: 92 percent, anterior descending artery; 53.8 percent, right coronary artery; 46.1 percent, circumflex coronary artery; 23 percent, lateroventricular coronary artery; 15.3 percent, posterior descending coronary artery; 7.7 percent, diagonal coronary artery. No lesion was found in the left coronary artery. Conclusion In our analysis, 25 percent of patients with negative SPECT showed significant obstructive lesions.


Objetivo. Evaluar la presencia de enfermedad coronaria obstructiva (ECO) en pacientes con SPECT negativo sometidos a Coronariografía TC64. Material y métodos. Se evaluaron pacientes sometidos a coronariografía TC con SPECT negativo desde julio 2007 a enero 2010.Se utilizó un tomógrafo Philips Brilliance 64 y contraste iodado de baja osmolaridad. Las arterias coronarias se dividieron en 16 segmentos evaluando la presencia de ECO (lesión > 50 por ciento), enfermedad coronaria no obstructiva (lesión < 50 por ciento) o sin enfermedad coronaria. Resultados. Del total de 447 pacientes, se incluyeron 52 pacientes con SPECT negativo. La edad media fue 60 años, 67 por ciento mujeres. Se observaron 13 pacientes (25 por ciento) con ECO. Las afecciones arteriales fueron: arteria descendente anterior en el 92 por ciento, coronaria derecha 53,8 por ciento, circunfleja 46,1 por ciento, lateroventricular 23 por ciento, descendente posterior 15,3 por ciento, diagonal 7,7 por ciento y ninguna en el tronco coronario izquierdo. Conclusión. Según nuestra serie, el 25 por ciento de los pacientes con SPECT negativo presentó lesiones obstructivas significativas.


Subject(s)
Humans , Male , Adult , Female , Middle Aged , Coronary Angiography/methods , Coronary Stenosis , Tomography, X-Ray Computed/methods , Coronary Stenosis , False Negative Reactions , Tomography, Emission-Computed, Single-Photon , Predictive Value of Tests
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