• Leonardo Sara, Carlos E Rochitte, Pedro A Lemos, Hiroyuki Niinuma, Marc Dewey, Edward P Shapiro, Ilan Gottlieb, Antônio P Mansur, José C Nicolau, Albert C Lardo, Clerio F Azevedo, Roberto Kalil-Filho, Andrea L Vavere, Silvia Cohn, Christopher Cox, Jeffrey Brinker, Julie M Miller, and João A C Lima.
• Heart Institute, InCor, University of São Paulo Medical School, São Paulo, Brazil.
• Int. J. Cardiol. 2014 Dec 15; 177 (2): 385-91.

BackgroundMulti-detector computed tomography angiography (MDCTA) is a promising method for risk assessment of patients with acute chest pain. However, its diagnostic performance in higher-risk patients has not been investigated in a large international multicenter trial. Therefore, in the present study we sought to estimate the diagnostic accuracy of MDCTA to detect significant coronary stenosis in patients with acute coronary syndrome (ACS).MethodsPatients included in the CORE64 study were categorized as suspected-ACS or non-ACS based on clinical data. A 64-row coronary MDCTA was performed before invasive coronary angiography (ICA) and both exams were evaluated by blinded, independent core laboratories.ResultsFrom 371 patients included, 94 were categorized as suspected ACS and 277 as non-ACS. Patient-based analysis showed an area under the receiver-operating-characteristic curve (AUC) for detecting ≥ 50% coronary stenosis of 0.95 (95% CI: 0.88-0.98) in ACS and 0.92 (95% CI: 0.88-0.95) in non-ACS group (P=0.29). The sensitivity, specificity, positive and negative predictive values of MDCTA were 0.90(0.80-0.96), 0.88(0.70-0.98), 0.95(0.87-0.99) and 0.77(0.58-0.90) in suspected ACS patients and 0.87(0.81-0.92), 0.86(0.79-0.92), 0.91(0.85-0.95) and 0.82(0.74-0.89) in non-ACS patients (P NS for all comparisons). The mean calcium scores (CS) were 282 ± 449 in suspected ACS and 435 ± 668 in non-ACS group. The accuracy of CS to detect significant coronary stenosis was only moderate and the absence or minimal coronary artery calcification could not exclude the presence of significant coronary stenosis, particularly in ACS patients.ConclusionsThe diagnostic accuracy of MDCTA to detect significant coronary stenosis is high and comparable for both ACS and non-ACS patients.Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

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