Relation between radionuclide angiographic regional ejection fraction and left ventricular regional ischemia in awake dogs.

Published

Journal Article

Multigated equilibrium radionuclide angiography was used to quantitate global and regional ejection fraction (EF) in 26 awake dogs 10 minutes after distal and then proximal occlusion of the left anterior descending (LAD) or left circumflex (LC) coronary artery. Changes in global and regional EF were correlated with simultaneous measurements of the extent of acute left ventricular (LV) ischemia measured by radioisotope-labeled microspheres. The extent of ischemia, defined as the percentage of LV mass with greater than 25% reduction in blood flow from normal regional flow, was linearly related to the percent change in global EF after LAD (r = 0.84) and LC (r = 0.77) occlusions. The extent of ischemia also correlated with regional EF (r = 0.47 to 0.88 for LAD and r = 0.41 to 0.69 for LC occlusions). In 24 of 25 LAD occlusions and in all 20 LC occlusions that produced a measurable ischemic zone, the maximal percent change in regional EF exceeded the percent change in global EF. Two LAD occlusions and 2 LC occlusions reduced regional EF but not global EF. Thus, global and regional EF decreased in direct proportion to the extent of acute myocardial ischemia; regional ischemia produced greater changes in regional than in global EF.

Full Text

Duke Authors

Cited Authors

  • Schneider, RM; Roberts, KB; Morris, KG; Stanfield, JA; Cobb, FR

Published Date

  • January 15, 1984

Published In

Volume / Issue

  • 53 / 2

Start / End Page

  • 294 - 301

PubMed ID

  • 6695726

Pubmed Central ID

  • 6695726

International Standard Serial Number (ISSN)

  • 0002-9149

Digital Object Identifier (DOI)

  • 10.1016/0002-9149(84)90442-9

Language

  • eng

Conference Location

  • United States