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In patients with good collaterals, stress induced transient enlargement of the perfusion defect, however, in those with poor or no collaterals the enlargement did not occur (p&gt;0.05). Wall motion abnormality on LVG was significantly milder in the former patients than in the latter (p&gt;0.001). Transient enlargement of the perfusion defect after stress and milder left ventricular asynergy were more frequently observed in patients with anterior MI and good collaterals. These observations indicate that good collaterals may keep some myocardium in the peri\u2010infarct zone viable.<\/jats:p>","DOI":"10.1002\/clc.4960090402","type":"journal-article","created":{"date-parts":[[2009,2,7]],"date-time":"2009-02-07T03:23:04Z","timestamp":1233976984000},"page":"137-144","source":"Crossref","is-referenced-by-count":8,"title":["Significance of collateral circulation on peri\u2010infarct zone: Assessment with stress thallium\u2010201 scintigraphy"],"prefix":"10.1002","volume":"9","author":[{"given":"T.","family":"Imamura","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Araki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T.","family":"Fukuyama","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y.","family":"Maruoka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Ootsubo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Nakamura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y.","family":"Koiwaya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Tanaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2009,2,5]]},"reference":[{"key":"e_1_2_1_1_1","first-page":"5","article-title":"Determinants of coronary surgery in a consecutive patient series from geographically dispersed medical contents. 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