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Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
Left ventricular performance and coronary flow after coronary embolization with plastic microspheres
The Journal of Clinical Investigation
|August 1, 1971
Summary
Embolizing canine hearts with microspheres reduced coronary flow and ventricular performance. This study highlights risks of embolization during cardiopulmonary bypass, impacting coronary flow and cardiac function.
Area of Science:
- Cardiovascular Physiology
- Cardiac Surgery
- Biomedical Engineering
Background:
- Cardiopulmonary bypass systems can lead to embolization.
- Emboli may compromise coronary flow and ventricular performance.
- Understanding these effects is crucial for patient outcomes.
Purpose of the Study:
- To investigate the impact of microsphere embolization on coronary flow.
- To assess the effects on left ventricular performance and compliance.
- To relate findings to clinical scenarios involving pump oxygenator systems.
Main Methods:
- Isolated canine hearts were perfused with arterial blood.
- Coronary beds were progressively embolized with large (865 μm) or small (10 μm) microspheres.
- Coronary flow, left ventricular pressure, and circumference were monitored.
Main Results:
- Large microspheres progressively reduced coronary flow and ventricular performance.
- Small microspheres initially increased coronary flow, suggesting vasodilator release.
- Both emboli types decreased ventricular compliance and ultimately impaired performance.
Conclusions:
- Microsphere embolization significantly impairs coronary flow and cardiac function.
- Findings are relevant to embolization risks during cardiopulmonary bypass.
- Reduced ventricular compliance and performance are key consequences.
