Reverse redistribution in resting thallium-201 myocardial scintigraphy in patients with coronary artery disease: Relation to coronary anatomy and ventricular function(220 visite) Pace L, Cuocolo A, Maurea S, Nicolai E, Imbriaco M, Nappi A, Morisco C, Chiariello M, Trimarco B, Salvatore M
We studied 25 male patients, with coronary artery disease, mean age 56 +/- 8 yr. All underwent Tl-204 rest-redistribution and resting Tc-99m methoxyisobutyl isonitrile (MIBI) cardiac imaging. Regional Tl-201 and MIBI uptake were quantitatively analyzed. Regional left ventricular wall motion (WM) was visually assessed on MIBI gated images using a three-point scale (0 = normal, 1 = hypokinetic, 2 = a/dyskinetic). Two patterns of reverse redistribution (RR) were identified: RR-A when Tl-201 uptake was normal on rest images and abnormal on redistribution images, and RR-B when Tl-201 uptake was abnormal on rest images and a significant decrease in uptake was observed on redistribution images. Of the total 375 myocardial segments analyzed, 229 were classified as normal (NI), 40 as reversible defect (RD), 74 as irreversible defect (ID); 26 showed RR-A while 6 myocardial segments had RR-B. Myocardial segments with RR-A differed from NI in the degree of coronary artery stenosis (81% +/- 33% versus 57% +/- 39%, respectively, p < 0. 05), in WM score (1. 1 +/-0.7 versus 0.5 +/- 0.6, respectively, p < 0.01), and in MIBI uptake (81% +/- 10% versus 92% +/- 9%, respectively, p < 0.0001). Moreover, the percent of myocardial segments supplied by a totally occluded coronary artery was significantly higher (p < 0.05) in myocardial segments with RR-A (46%) than in NI (22%). Segments with RR-B did not show any significant difference either from RD and ID. These results suggest that myocardial segments with RR-A on resting Tl-201 images have impaired function and are supplied by severely stenosed coronary arteries and should not be considered normal.
Hesse B, Tagil K, Cuocolo A, Anagnostopoulos C, Bardies M, Bax J, Bengel F, Busemann Sokole E, Davies G, Dondi M, Edenbrandt L, Franken P, Kjaer A, Knuuti J, Lassmann M, Ljungberg M, Marcassa C, Marie PY, Mckiddie F, O'connor M, Prvuolovich E, Underwood R * 3. 0 T perfusion MR imaging(490 visite) Rivista Di Neuroradiologia (ISSN: 1120-9976), 2004; 17(6): 807-812. Impact Factor:0.023 DettagliEsporta in BibTeXEsporta in EndNote
522 Records (481 escludendo Abstract e Conferenze). Impact factor totale: 1605.727 (1467.603 escludendo Abstract e Conferenze). Impact factor a 5 anni totale: 1772.648 (1607.704 escludendo Abstract e Conferenze).