Computational modeling of acute myocardial infarction
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Murine Myocardial Infarction Model using Permanent Ligation of Left Anterior Descending Coronary Artery
Published on: August 16, 2019
Insights
This study introduces a computational model to simulate early heart attack (myocardial infarction) effects, including cell death and thinning. The model accurately reflects clinical observations, aiding future heart failure prediction.
Area of Science:
- Cardiovascular Science
- Computational Biology
- Biomedical Engineering
Background:
- Myocardial infarction (heart attack) causes oxygen deprivation, leading to heart muscle damage.
- Early consequences include cardiomyocyte death, wall thinning, and ventricular dilation.
- Later stages involve scar formation and compensatory hypertrophy.
Purpose of the Study:
- To develop a computational model for short-term adaptation following myocardial infarction.
- To simulate the biomechanical effects of cell death and collagen degradation.
- To provide a foundation for predicting heart failure progression.
Main Methods:
- Utilized the continuum theory of multiplicative growth.
- Developed a computational model to capture early myocardial infarction events.
- Simulated the effects of cell death and collagen degradation on ventricular mechanics.
Main Results:
- The model accurately captures early myocardial infarction consequences like wall thinning and ventricular dilation.
- Simulations show good agreement with clinical observations in the early stages.
- The model successfully integrates cell death and collagen degradation effects.
Conclusions:
- The computational model provides a valuable tool for understanding short-term myocardial infarction adaptation.
- This work is a crucial first step towards simulating myocardial infarction progression.
- The model can help predict heart failure risk based on infarct characteristics.
Abstract:
Myocardial infarction, commonly known as heart attack, is caused by reduced blood supply and damages the heart muscle because of a lack of oxygen. Myocardial infarction initiates a cascade of biochemical and mechanical events. In the early stages, cardiomyocytes death, wall thinning, collagen degradation, and ventricular dilation are the immediate consequences of myocardial infarction. In the later stages, collagenous scar formation in the infarcted zone and hypertrophy of the non-infarcted zone are auto-regulatory mechanisms to partly correct for these events. Here we propose a computational model for the short-term adaptation after myocardial infarction using the continuum theory of multiplicative growth. Our model captures the effects of cell death initiating wall thinning, and collagen degradation initiating ventricular dilation. Our simulations agree well with clinical observations in early myocardial infarction. They represent a first step toward simulating the progression of myocardial infarction with the ultimate goal to predict the propensity toward heart failure as a function of infarct intensity, location, and size.
