caa a22 4500 475791533 CHVBK 20180406123712.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1023/A:1006432027712 doi (NATIONALLICENCE)springer-10.1023/A:1006432027712 Value of navigator echo magnetic resonance angiography in detecting occlusion/patency of arterial and venous, single and sequential coronary bypass grafts [Elektronische Daten] [G. Molinari, F. Sardanelli, F. Zandrino, M. Balbi, M. Masperone] Aim of our work was to validate magnetic resonance angiography (MRA) in detecting occlusion/patency of coronary artery bypass grafts. Twenty patients with previous history of bypass surgery and recurrent episodes of chest pain were enrolled. Two patients could not be studied (claustrophobia, erratic breathing). Thus, 18 patients with 51 bypasses were examined using a navigator echo sequence: 21 arterial grafts (six sequential) and 30 saphenous vein grafts (five sequential). All patients had undergone contrast conventional angiography 3-15 days before MRA. The magnetic resonance (MR) data set was analyzed by two independent readers blinded to the results of conventional angiography (occlusion of 12 of 51 grafts). At magnetic resonance, two bypasses of the posterior descending artery, patent at conventional angiography, could not be visualized because of imaging slab malpositioning. Interobserver concordance was 96% (47/49). Magnetic resonance and conventional angiography provided identical answers in 47 out of 49 (96%) of the examined grafts. Eleven out of 12 occluded grafts and 36 out of 37 patent grafts were correctly identified with MR. As far as occlusion is concerned, the sensitivity of MR was 91%, the specificity 97%. To summarize, a 30 min outpatient MR examination is highly reliable in determining occlusion/patency of arterial and venous, single and sequential bypasses. Kluwer Academic Publishers, 2000 angiography nationallicence bypass nationallicence coronary disease nationallicence heart nationallicence magnetic resonance (MR) nationallicence Molinari G. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut Sardanelli F. Department of Diagnostic Imaging, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut Zandrino F. Department of Diagnostic Imaging, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut Balbi M. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut Masperone M. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut The International Journal of Cardiac Imaging Kluwer Academic Publishers 16/3(2000-06-01), 149-160 0167-9899 16:3<149 2000 16 10554 https://doi.org/10.1023/A:1006432027712 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1006432027712 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Molinari G. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut NATIONALLICENCE 700 1- Sardanelli F. Department of Diagnostic Imaging, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut NATIONALLICENCE 700 1- Zandrino F. Department of Diagnostic Imaging, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut NATIONALLICENCE 700 1- Balbi M. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut NATIONALLICENCE 700 1- Masperone M. Department of Cardiology, University of Genoa School of Medicine, San Martino Hospital, Genoa, Italy aut NATIONALLICENCE 773 0- The International Journal of Cardiac Imaging Kluwer Academic Publishers 16/3(2000-06-01), 149-160 0167-9899 16:3<149 2000 16 10554 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer