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Computer modeling of non-adjacent regional ischemic zones on ventricular function
J K Li1, J J Wang, G Drzewiecki
1Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08855-0909, USA.
Computers in Biology and Medicine
|September 1, 1996
Summary
Regional myocardial ischemia impairs left ventricular (LV) function. A novel computer model shows that larger ischemic zones and asynchronous activation worsen LV dysfunction, while increased preload improves function during ischemia.
Area of Science:
- Cardiovascular Physiology
- Computational Biology
- Medical Modeling
Background:
- Regional myocardial ischemia commonly depresses left ventricular (LV) function.
- Quantitative analysis of hemodynamic consequences during ischemia is limited.
Purpose of the Study:
- To investigate the hemodynamic consequences of regional myocardial ischemia using a novel computer model.
- To analyze the impact of ischemic zone size and activation timing on LV function.
Main Methods:
- Development of a cardiovascular system computer model including LV with ischemic and normal zones, preload, and arterial afterload.
- Simulation of varying ischemic zone (IZ) sizes and activation timings relative to the normal zone (NZ).
Main Results:
- Increased IZ size and activation asynchronization between NZ and IZ led to more severe LV dysfunction.
- Elevated preload during ischemia demonstrated an improvement in LV function.
- Model predictions align with existing experimental observations.
Conclusions:
- The developed computer model accurately predicts hemodynamic consequences of regional myocardial ischemia.
- The model is a valuable tool for analyzing myocardial ischemic function and understanding LV dysfunction.
- Asynchrony and size of ischemic regions are critical determinants of LV performance during ischemia.