Related Experiment Video
Updated: Jul 27, 2026
In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
Myocardial volume perfused by coronary artery branches. A three-dimensional X-ray computed tomographic evaluation in
Y H Liu1, R C Bahn, E L Ritman
1Department of Physiology, Mayo Medical School, Rochester, Minnesota 55905.
Insights
The cumulative length of coronary arterial branches correlates with the volume of heart muscle they supply. This finding may help estimate the myocardium at risk during coronary artery occlusion.
Area of Science:
- Cardiovascular anatomy
- Medical imaging
- Myocardial perfusion
Background:
- Assessing myocardial volume at risk is crucial for managing coronary artery disease.
- Current methods may not fully capture the extent of tissue perfusion.
- Understanding the relationship between arterial geometry and perfused volume is needed.
Purpose of the Study:
- To test the hypothesis that cumulative arterial branch length relates to perfused tissue volume.
- To explore the utility of this relationship in estimating myocardium at risk during coronary occlusion.
Main Methods:
- In vivo measurement of myocardial volume and cumulative arterial branch length in pig hearts.
- Utilized multislice computed tomographic (CT) imaging with contrast agent injection.
- Analyzed data from left anterior descending, right coronary, and left circumflex arteries.
Main Results:
- Established inverse relationships between perfused myocardial volume (V) and arterial length (L) for major coronary arteries.
- Left anterior descending artery: V = 42.4 x 10(-0.011L) (r = -0.892).
- Right coronary artery: V = 37.0 x 10(-0.008L) (r = -0.888).
- Left circumflex artery: V = 27.7 x 10(-0.011L) (r = -0.883).
Conclusions:
- Suggests that the three-dimensional geometry of the epicardial coronary arterial tree can estimate myocardial volume at risk.
- Potential for non-invasive assessment of infarct size based on coronary anatomy.
- Highlights the link between coronary architecture and myocardial perfusion territory.
Rationale And Objectives:
The authors tested the hypothesis that the cumulative length of arterial branches is related to the volume of tissue they perfuse. This experiment investigates the potential value of this approach for assessing the volume of myocardium at risk in cases of coronary occlusion.
Methods:
The volume of myocardium perfused by coronary arterial branches and the cumulative length of the main feeder branches perfusing that volume were measured in vivo in pig hearts from multislice computed tomographic (CT) images of the heart, recorded during an aortic root injection of nonionic contrast agent.
Results:
The relationship between the volume (V, in milliliters) of perfused myocardium and the length (L, in millimeters) of the left anterior descending artery was V = 42.4 x 10(-0.011L) (r = -0.892); for the right coronary artery, V = 37.0 x 10(-0.008L) (r = -0.888); and for the left circumflex coronary artery, V = 27.7 x 10(-0.011L) (r = -0.883).
Conclusions:
These results suggest that the maximum volume of myocardium at risk of infarction due to blockage along a coronary artery could possibly be estimated from the three-dimensional geometry of the epicardial coronary arterial tree.
