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Comparison between four-slice computed tomography and coronary angiography for the assessment of coronary stents

2006; Lippincott Williams & Wilkins; Volume: 7; Issue: 5 Linguagem: Inglês

10.2459/01.jcm.0000223254.24309.b3

1558-2035

Pietro Mazzarotto, Paolo Di Renzi, Giovanni Minio Paluello, A Carunchio, Roberto Ricci, Antonio Molisso, Vincenzo Ceci, Ciro Indolfi,

Advanced MRI Techniques and Applications

Background The present study aimed to evaluate the diagnostic accuracy of four-slice computed tomography for the detection, localization and patency assessment of metal coronary stents in a general population referred for coronary angiography late after coronary angioplasty. Methods Twenty-four consecutive patients with 34 coronary stents underwent multislice computed tomography within 24 h before a clinically driven coronary angiography performed 245 ± 92 days after coronary stent implantation. For each patient, two independent operators were asked to evaluate the overall number of stents, the treated coronary vessels and segments, the presence of side-branches in the stented segment, the vessel patency, and the presence of binary in-stent restenosis. Results Four-slice computed tomography was feasible in 23 out of 24 patients (96%). Diagnostic accuracy was 94% for stent detection, 96% for the recognition of the stented coronary vessel and 97% for the identification of the stented segment. Accuracy in detection of side-branches in the stented segment, vessel patency and in-stent restenosis was 86%, 88% and 50%, respectively. Conclusions Four-slice computed tomography is accurate in the identification of the stented coronary vessel and segment. By contrast, accuracy is low in the detection of vessel patency and in-stent restenosis. Such a technique does not appear to be useful as a screening tool before invasive diagnostic procedures.