Small apex-to-base heterogeneity in radius-to-thickness ratio by three-dimensional magnetic resonance imaging.

@article{Beyar1993SmallAH,
  title={Small apex-to-base heterogeneity in radius-to-thickness ratio by three-dimensional magnetic resonance imaging.},
  author={Rafae Beyar and James L. Weiss and Edward P. Shapiro and W. L. Graves and Walter J. Rogers and Myron L. Weisfeldt},
  journal={The American journal of physiology},
  year={1993},
  volume={264 1 Pt 2},
  pages={H133-40}
}
Reported large base-to-apex differences in endocardial area ejection fraction may suggest large variability in myocardial function and load. To test ventricular load heterogeneities, we measured the ratio of radius of curvature to wall thickness (R/T), as a stress index reflecting myocardial load. End-diastolic (ED) and end-systolic (ES) magnetic resonance cross-sectional images were obtained in 15 open-chest dogs at 5 levels from base to apex, from which 4 three-dimensional thick disks were… CONTINUE READING

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