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Thermal detection of vulnerable plaque
Mohammad Madjid1, Morteza Naghavi, Basit A Malik
1Division of Cardiology/Internal Medicine, University of Texas-Houston Health Science Center, USA.
The American Journal of Cardiology
|December 3, 2002
Summary
Measuring atherosclerotic plaque temperature can detect vulnerable plaques. Plaque temperature correlates with inflammation and predicts adverse cardiac events, offering a new functional imaging approach.
Area of Science:
- Cardiovascular Research
- Medical Imaging
- Biomedical Engineering
Background:
- Inflamed atherosclerotic plaques exhibit higher temperatures.
- Plaque temperature correlates with inflammatory cell density and proximity to the lumen.
- Vulnerable plaques may be identified by thermal properties.
Purpose of the Study:
- To investigate the relationship between atherosclerotic plaque temperature and inflammation.
- To assess the potential of thermography for detecting vulnerable plaques.
- To explore thermal heterogeneity in atherosclerotic lesions across species.
Main Methods:
- Measurement of plaque temperature and pH heterogeneity in human and animal models.
- Development and application of a thermography basket catheter for in vivo imaging.
- Correlation of thermal data with inflammatory markers and clinical outcomes.
Main Results:
- Plaque temperature is directly related to inflammatory cell density and inversely to smooth muscle cell density.
- Areas of lower pH were associated with higher temperatures, particularly in lipid-rich regions.
- In vivo thermography demonstrated thermal heterogeneity in atherosclerotic lesions of dogs and rabbits, later confirmed in humans.
Conclusions:
- Plaque thermal heterogeneity is linked to clinical instability and predicts adverse cardiac events.
- Thermography represents a novel functional imaging method for detecting vulnerable plaques.
- This technique holds promise for risk stratification and clinical research in cardiovascular disease.