Related Experiment Videos
[MR tomographic functional analysis of the left ventricle]
1Klinik und Poliklinik für Radiologie, Universität Mainz.
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|April 1, 1993
Summary
This study provides reference values for healthy left ventricle contraction and relaxation velocities using magnetic resonance imaging (MRI). It reveals distinct regional differences in volume changes, with apical regions showing greater velocity than basal regions.
Area of Science:
- Cardiovascular imaging
- Cardiac mechanics
- Biomedical engineering
Context:
- Assessing left ventricular function is crucial for diagnosing cardiac diseases.
- Magnetic Resonance Imaging (MRI) offers advanced capabilities for evaluating cardiac mechanics.
- Understanding normal contraction and relaxation patterns is essential for identifying abnormalities.
Purpose:
- To present continuous MRI analysis of healthy left ventricle contraction and relaxation.
- To establish reference values for systolic and diastolic velocities.
- To investigate regional differences in ventricular volume changes.
Summary:
- Continuous MRI analysis yielded reference values for total left ventricle systolic (Vsyst.r.total = 342 ± 47% LVEDV/sec) and diastolic (Vdiast.r.total = 303 ± 59% LVEDV/sec) velocities.
- Apical regions exhibited significantly greater volume changes per unit time compared to basal regions during both systole (411 ± 89% EDSV/sec vs 261 ± 35% EDSV/sec) and diastole (810 ± 145% EDSV/sec vs 245 ± 70% EDSV/sec).
- The timing of end-systolic minimal volumes in apical layers was delayed (22.4 ± 7.9% tsyst) relative to the total ventricle, indicating a systolic redistribution of volume from apex to base.
Impact:
- Provides essential reference data for clinical interpretation of cardiac MRI studies.
- Enhances the understanding of normal left ventricular mechanics and regional function.
- Aids in the early detection and characterization of cardiac pathologies affecting ventricular dynamics.