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Limitations of angiography for analyzing coronary atherosclerosis progression or regression
Insights
Serial coronary angiography shows limited utility for tracking atherosclerosis progression or regression. Angiography cannot accurately measure atherosclerosis extent or composition, making it an unsatisfactory tool.
Area of Science:
- Cardiovascular disease research
- Medical imaging analysis
Background:
- Atherosclerosis progression and regression are key indicators of cardiovascular health.
- Serial coronary angiography is a common imaging technique used in cardiology.
Purpose of the Study:
- To evaluate the effectiveness and drawbacks of using serial coronary angiography.
- To determine if coronary angiography can reliably assess atherosclerosis changes over time.
Main Methods:
- Conducted a MEDLINE literature search from 1966 to 1994.
- Included studies on lipid reduction, lifestyle modification, and animal models.
- Focused on angiographic coronary artery disease and angiography limitations.
Main Results:
- Reported changes in luminal diameter are small (0.3 mm or 10%) and require long study durations (1-10 years).
- Angiography fails to measure atherosclerosis composition and underestimates its extent.
- Variability in measurements necessitates large sample sizes for statistical significance.
Conclusions:
- Serial coronary angiography has significant limitations.
- It is not a reliable method for detecting atherosclerosis progression or regression.
Purpose:
To analyze the utility and limitations of serial coronary angiography for determining atherosclerosis progression and regression.
Data Sources:
A MEDLINE search of the English-language literature (1966 to January 1994) using the keywords atherosclerosis regression, atherosclerosis progression, lipid reduction therapy, and coronary angiography.
Study Selection:
Selected articles on the effects of cholesterol reduction and lifestyle modification on angiographic coronary artery disease, on the animal models of atherosclerosis progression and regression, and on the limitations of coronary angiography.
Data Extraction:
Independent extraction by two authors.
Results:
Although several studies have reported that the rate of atherosclerosis progression, defined by serial coronary angiography, can be reduced and that luminal diameter can be improved somewhat by aggressive lipid modification, the reported changes are small (0.3 mm or 10% change) and have required a prolonged study duration (range, 1 to 10 years). More importantly, angiography simply does not measure atherosclerosis and cannot assess lesion composition. Angiography also underestimates the extent of atherosclerosis, especially in angiographically normal segments. In addition, difficulties with data acquisition, such as substantial variabilities in serial measurements of percent diameter stenosis and minimal luminal diameters, require large sample sizes to show statistically significant regression, even with computerized quantification.
Conclusions:
Given its current limitations, serial coronary angiography is not a satisfactory means of detecting atherosclerosis progression or regression.
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