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Individual variation in susceptibility to extracranial carotid atherosclerosis
J Rubens1, M A Espeland, J Ryu
1Department of Medicine, Wake Forest University Medical Center, Bowman Gray School of Medicine, Winston-Salem, NC 27103.
Insights
Coronary status significantly influences how risk factors affect carotid atherosclerosis. Understanding this link is crucial for predicting and managing cerebrovascular disease in patients with heart conditions.
Area of Science:
- Cardiovascular Medicine
- Neurology
- Vascular Biology
Background:
- Coronary angiography patients often have coexisting atherosclerosis.
- Risk factors for cardiovascular disease may differentially impact carotid atherosclerosis based on coronary status.
Purpose of the Study:
- To assess risk factors for coronary artery disease.
- To quantify extracranial carotid atherosclerosis extent in patients undergoing coronary angiography.
- To investigate how coronary status modifies the relationship between risk factors and carotid atherosclerosis.
Main Methods:
- Noninvasive methods used to quantify carotid atherosclerosis.
- Analysis of 382 patients (27-80 years old, 183 men, 199 women, 30 black, 352 white) with heart disease symptoms.
- Correlation of traditional risk factors with carotid atherosclerosis extent, stratified by presence or absence of coronary disease.
Main Results:
- Risk factor association with carotid atherosclerosis varied based on coronary status.
- Age and hypertension were independent predictors in both groups.
- Risk factors explained more variance in carotid atherosclerosis for patients with coronary disease (r2=0.41) than without (r2=0.21).
- Specific risk factors like smoking and left ventricular hypertrophy showed differential effects based on coronary status.
Conclusions:
- Coronary status is a critical factor in the response of carotid atherosclerosis to traditional risk factors.
- Findings may help reconcile discrepancies in population-based studies on race, gender, and atherosclerosis.
- Highlights the importance of considering coronary health when evaluating cerebrovascular risk.
Abstract:
Risk factors for coronary disease were assessed and noninvasive methods were used to quantitate the extent of extracranial carotid atherosclerosis in 382 patients free of cerebrovascular symptoms. The ages of the participants ranged from 27 to 80 years. There were 183 men and 199 women, 30 black and 352 white persons. All patients had heart disease symptoms and were hospitalized for coronary angiography. Correlation of risk factors with extent of extracranial carotid atherosclerosis in this series of patients undergoing coronary angiography uncovered individual variability in relationships between risk factors and carotid atherosclerosis that depended on coronary status. Risk factors for carotid atherosclerosis in patients with and without coronary disease differed. Age and hypertension were independently related to carotid atherosclerosis in patients with, as well as those without, coronary disease. However, other risk factors were related to carotid atherosclerosis in only one group or the other. Risk factors correlated strongly with carotid atherosclerosis in patients with coronary disease (r2 = 0.41) but poorly in those with no coronary disease (r2 = 0.21). Certain risk factors (age, pack years of smoking, left ventricular hypertrophy) related differently to the extent of carotid atherosclerosis in patients with, than in those without, coronary disease. Clarification of the role of coronary status in the carotid atherosclerosis response to risk factors may partly explain the results of certain population-based studies that have related race, gender, and other risk factors to carotid atherosclerosis.(ABSTRACT TRUNCATED AT 250 WORDS)