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.
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.
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.
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.
aU.O. Cardiologia invasiva e interventistica endovascolare, Ospedale S. Carlo – I.D.I., Rome, Italy
bU.O.C. Radiologia, Ospedale Fatebenefratelli Isola Tiberina, Rome, Italy
cU.O.C. Radiologia, Rome, Italy
dU.O.C. Cardiologia, Ospedale Santo Spirito, Rome, Italy
eDivisione di Cardiologia, Università Magna Graecia, Catanzaro, Italy
Received 13 May, 2005
Revised 6 September, 2005
Accepted 14 September, 2005
Correspondence and requests for reprints to Dr Pietro Mazzarotto, U.O. Cardiologia invasiva e interventistica endovascolare, Ospedale S. Carlo – I.D.I., Via Aurelia 275, 00165 Rome, Italy Tel: +39 06 39706457; fax: +39 06 39706465; e-mail: email@example.com