The role of noninvasive tests versus pulmonary angiography in the diagnosis of pulmonary embolism.

@article{Cheely1981TheRO,
  title={The role of noninvasive tests versus pulmonary angiography in the diagnosis of pulmonary embolism.},
  author={R Cheely and William H. McCartney and J. Randolph Perry and David Delany and Leo K. Bustad and V H Wynia and Thomas R. Griggs},
  journal={The American journal of medicine},
  year={1981},
  volume={70 1},
  pages={
          17-22
        }
}
We studied 243 patients in whom 248 pulmonary angiograms were performed because of suspected pulmonary embolism. Ventilation and perfusion lung scanning in 140 of them revealed 38 to be in low and high probability groups. Of 19 patients with subsegmental and nonsegmental perfusion defects that were matched with ventilation defects, none had pulmonary embolism. Conversely, angiography was positive in 17 of 19 patients with multiple segmental or lobar perfusion defects in areas of normal… CONTINUE READING
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