Related Experiment Videos
Assessment of right ventricular anatomy and function by quantitative radionuclide ventriculography
S J Ratner1, P J Huang, M I Friedman
1Department of Nuclear Medicine (Radiology), St. Luke's-Roosevelt Hospital Center, New York, New York.
Journal of the American College of Cardiology
|February 1, 1989
Summary
A new geometric method simplifies measuring right ventricular ejection fraction and wall motion using radionuclide angiocardiograms. This technique reveals regional abnormalities missed by standard ejection fraction analysis, improving cardiac diagnostics.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Imaging
Background:
- Traditional radionuclide methods for right ventricular ejection fraction (RVEF) and volumes are complex and prone to error.
- Systematic assessment of regional right ventricular (RV) wall motion is often lacking.
Purpose of the Study:
- To describe a simplified geometric method for measuring RVEF, volumes, and regional wall motion from first-pass radionuclide angiocardiograms.
- To establish normal values for RV function and wall motion using this technique.
Main Methods:
- Application of a validated single-plane geometric method to first-pass radionuclide angiocardiograms.
- Definition of five right ventricular chords to assess regional wall motion.
- Analysis of 14 healthy individuals, 23 patients with anterior myocardial infarction, 21 with inferior myocardial infarction, and 21 with dilated cardiomyopathy.
Main Results:
- The geometric method accurately assessed RVEF, volumes, and regional wall motion.
- Regional wall motion abnormalities were detected in RVs even when global RVEF was normal in myocardial infarction patients.
- Dilated cardiomyopathy patients showed distinct RV wall motion abnormalities in the conus segment.
Conclusions:
- A simple geometric technique can reliably assess RVEF, volumes, and RV wall motion from radionuclide studies.
- Chord shortening analysis provides crucial information beyond global ejection fraction, identifying regional dysfunction.
- Further investigation is needed to fully elucidate the clinical significance of these findings.