Comparison of bicycle and treadmill radionuclide angiocardiography.

Published

Journal Article

The purpose of this study was to test motion-correction algorithms for initial-transit radionuclide angiocardiograms acquired at rest and during bicycle and treadmill exercise. Treadmill data was spatially reoriented by computer software designed to eliminate motion of a 125I point source simultaneously recorded at a lower energy window. A second algorithm based on left ventricular centroid counts further corrected for motion on all studies. Exercise left ventricular ejection fraction was higher on the treadmill (0.68 +/- 0.07) compared to the bicycle (0.64 +/- 0.08) (p less than 0.0001, r = 0.88). Treadmill exercise also resulted in larger end-diastolic volumes (180 +/- 30 versus 157 +/- 36, p less than 0.0001), stroke volumes (124 +/- 28 versus 101 +/- 29, p less than 0.0001) and cardiac outputs (19.9 +/- 4.6 versus 15.9 +/- 5.0, p less than 0.0001). Similar variances for these hemodynamic measurements suggest that the mean differences observed were physiologic and that error from body motion was effectively corrected by this approach. We conclude that the measurement of left ventricular function during treadmill exercise, when combined with these techniques for correcting motion, is a reasonable alternative to conventional bicycle exercise.

Full Text

Duke Authors

Cited Authors

  • Potts, JM; Borges-Neto, S; Smith, LR; Jones, RH

Published Date

  • October 1991

Published In

Volume / Issue

  • 32 / 10

Start / End Page

  • 1918 - 1922

PubMed ID

  • 1919733

Pubmed Central ID

  • 1919733

International Standard Serial Number (ISSN)

  • 0161-5505

Language

  • eng

Conference Location

  • United States