One-step Examination of Myocardial Perfusion Imaging Combined with Coronary Artery Calcium Score in Diagnosis of Coronary Artery Disease / 中国医学影像学杂志

ABSTRACT

Purpose The one-step examination of myocardial perfusion imaging (MPI) combined with coronary artery calcium score (CACS) can obtain both coronary functional information and anatomical information simultaneously, this paper aims to evaluate the value of the one-step examination of MPI combined with CACS for detecting coronary artery disease (CAD). Materials and Methods 188 cases who underwent one-step examination of MPI combined with CACS and invasive coronary angiography (ICA) because of chest tightness, chest pain with suspected coronary artery disease were analyzed retrospectively, with the results of ICA used asgold standard, the diagnostic efficacy of MPI, CACS and one-step examination with combination of the two techniques for CAD was investigated. Results ①Pre-test probability of CAD was intermediate in 79.8%(150/188), and high in 20.2%(38/188) cases. Seventy-three cases were confirmed as CAD and 115 of 188 patients were negative according to ICA.②The sensitivity, specificity, accuracy, positive predictive value (PPV) and negative predictive value (NPV) for the diagnosis of CAD by MPI were 65.8%, 75.7%, 71.8%, 63.1%and 77.7%, respectively. ③ The CACS of CAD group was significantly higher than the non-CAD group (494.96±99.60 vs. 38.15±16.03, P0.05) and accuracy (75.0% vs. 71.8%, P>0.05) showed no statistically significant difference; the sensitivity of MPI combined with CACS were significantly higher than CACS (80.8%vs. 60.3%, P0.05). Conclusion The one-step examination of MPI combined with CACS can reduce coronary heart disease misdiagnosis, improve the diagnostic sensitivity of CAD compared with the MPI or CACS, with high application value for the diagnosis of CAD, especially in moderate risk groups.