Abstract
Previous studies in dogs using the dynamic spatial reconstructor have shown that the total (blood + tissue) volume of the pericardial sack remains constant (within a few percent) throughout the cardiac cycle. Others have reported that pericardial volume in humans remains constant for parts of the cardiac cycle. We use three-dimensional datasets acquired using cardiac MRI to determine the constant-volume attribute of the four-chamber heart. The four-chamber constant-volume attribute is achieved by reciprocal variation of atrial and ventricular volumes, requiring oscillation of the atrioventricular valve plane. We develop a lumped parameter oscillator model having fixed external dimension to model atrioventricular (mitral) valve plane location as a function of time. We conclude that the constant volume attribute of the four-chambered heart is accurate to within 4-6%, and constant-volume based modeling of heart dynamics can predict mitral valve plane displacement throughout the cardiac cycle.
Original language | English |
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Pages (from-to) | 1252-1253 |
Number of pages | 2 |
Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
Volume | 2 |
State | Published - 2002 |
Event | Proceedings of the 2002 IEEE Engineering in Medicine and Biology 24th Annual Conference and the 2002 Fall Meeting of the Biomedical Engineering Society (BMES / EMBS) - Houston, TX, United States Duration: Oct 23 2002 → Oct 26 2002 |
Keywords
- Atrioventricular coupling
- Cardiac MRI
- Four-chamber heart function
- Modeling