Open AccessSignificance of collateral circulation on peri‐infarct zone: Assessment with stress thallium‐201 scintigraphy
Author(s) -
Imamura T.,
Araki H.,
Fukuyama T.,
Maruoka Y.,
Ootsubo H.,
Nakamura M.,
Koiwaya Y.,
Tanaka K.
Publication year - 1986
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960090402
Subject(s) - medicine , asynergy , scintigraphy , cardiology , collateral circulation , perfusion , infarction , myocardial infarction , thallium , peri , coronary circulation , radionuclide ventriculography , radiology , ejection fraction , blood flow , heart failure , inorganic chemistry , chemistry
To evaluate the significance of collateral circulation on peri‐infarct zone, stress myocardial scintigraphy and contrast left ventriculography (LVG) were performed in 38 patients with recent myocardial infarction (MI). All patients had at least one completely occluded coronary artery corresponding to the infarct area. 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>0.05). Wall motion abnormality on LVG was significantly milder in the former patients than in the latter (p>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‐infarct zone viable.