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Smoking and atherosclerosis in youth
A W Zieske1, H Takei, K B Fallon
1Department of Pathology, Louisiana State University Medical Center, New Orleans 70112, USA.
Atherosclerosis
|July 17, 1999
Summary
Smoking significantly accelerates atherosclerosis progression in coronary arteries. Smokers develop advanced lesions more rapidly than non-smokers, indicating smoking
Area of Science:
- Cardiovascular Science
- Pathology
- Public Health
Background:
- Coronary heart disease (CHD) is a leading cause of mortality in the US.
- Smoking is a well-established risk factor for CHD and atherosclerosis.
- The Pathobiological Determinants of Atherosclerosis in Youth (PDAY) study investigates atherosclerosis in young adults.
Purpose of the Study:
- To microscopically determine the stage at which smoking impacts coronary artery atherosclerosis.
- To compare lesion development in smokers versus non-smokers.
Main Methods:
- Microscopic classification of coronary artery lesions (Types I-V) in 50 smokers and 50 non-smokers (trauma victims aged 15-34).
- Utilized the American Heart Association's classification system for atherosclerosis staging.
Main Results:
- Smokers exhibited over twice the prevalence of advanced lesions (Types IV and V) compared to non-smokers (32% vs. 14%).
- Smokers had fewer early lesions (Types I-III) than non-smokers (38% vs. 62%).
- In smokers, advanced lesions were more prevalent than intermediate lesions, unlike non-smokers, suggesting rapid progression.
Conclusions:
- Smoking accelerates the progression of coronary artery atherosclerosis from intermediate to advanced lesion stages.
- The intima in smokers appears to be rapidly replaced by raised lesions, bypassing earlier stages.
- Findings highlight the detrimental impact of smoking on early atherosclerotic development in coronary arteries.