Valor de la tomografía de 64 cortes en el diagnóstico de la permeabilidad de los injertos aortocoronarios. Diagnostic value of 64 multislice computed tomography in the assessment of the coronary graft patency.

Abstract

Introduction Symptoms recurrence after surgical coronary artery revascularization requiresthe assessment of graft patency. At the moment, promissory results havebeen reported using the multislice computed tomography.Objective To determine the 64 multislice computed tomography diagnostic value of graftpatency.Method We included 65 patients with 178 coronary graft and symptoms recurrence. Initiallythey underwent a 64 multislice computed tomography scan with furtherassessment by invasive coronary angiography as gold standard reference. Parametersof diagnostic efficiency were determined as well as X2-test. Level ofsignificance was p<0.05.Results Total analysis of venous (n=116) and arterials (n=62) graft showed a sensitivity,specificity, positive and negative predictive value and validity of 100 %,with Kappa Index of 1 (IC95%,1-1), (p≤0,00001) for the diagnosis of totalocclusion by 64 multislice computed tomography assessment. Sensitivity,specificity, positive and negative predictive value of computed tomographyfor the diagnosis of significant stenosis of the 114 coronary graft without totalocclusion was 95; 98; 91 and 99% respectively with validity of 97% and KappaIndex of 0,92 (IC95% (p.0,00001), 0,82-1).Conclusions Multislice computed tomography coronary angiography is a precise non invasiveimaging technique for the detection of total occlusion and significant stenosisof the coronary graft.

Keywords

• coronary graft
• multislice computed tomography
• invasive coronary angiography.