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Prediction of carotid stenosis progression by lipid and hematologic measurements
J C Grotta1, F M Yatsu, L C Pettigrew
1Department of Neurology, University of Texas Medical School, Houston.
Insights
Elevated low-density lipoprotein (LDL) and fibrinogen levels, along with coronary artery disease, can predict progressing carotid atherosclerosis with 88% accuracy in asymptomatic patients.
Area of Science:
- Cardiovascular Medicine
- Vascular Biology
- Biochemistry
Background:
- Asymptomatic carotid stenosis is a significant risk factor for stroke.
- Identifying individuals with progressing atherosclerosis is crucial for timely intervention.
- Hematologic and lipid profiles may offer predictive insights into disease progression.
Purpose of the Study:
- To investigate whether hematologic or lipid abnormalities predict the progression of carotid atherosclerosis.
- To determine the accuracy of specific biomarkers in identifying patients with worsening stenosis.
Main Methods:
- Longitudinal study of 38 asymptomatic patients with carotid stenosis over 30 months.
- B-mode carotid ultrasonography at 2- to 6-month intervals to assess stenosis progression.
- Analysis of baseline hematologic markers (beta-thromboglobulin, platelet factor 4, fibrinogen) and lipid profiles (LDL, HDL).
Main Results:
- Patients with progressing stenosis showed higher baseline low-density lipoprotein (LDL) and fibrinogen levels.
- Coronary artery disease, elevated LDL, and elevated fibrinogen were independently associated with stenosis progression.
- A combination of these factors predicted progression with 88% accuracy.
Conclusions:
- Coronary artery disease, elevated LDL, and fibrinogen are strong predictors of carotid atherosclerosis progression.
- This predictive model can aid in identifying high-risk patients needing closer monitoring or intervention.
- Further research can explore therapeutic strategies targeting these identified risk factors.
Abstract:
We followed 19 men and 19 women with asymptomatic carotid stenosis up to 30 months to determine whether hematologic or lipid abnormalities could identify those individuals developing progressing carotid atherosclerosis (defined as an increase in mean percent stenosis greater than or equal to 19% or an increase in a single region of greater than or equal to 23%) on B-mode carotid ultrasonography performed at 2- to 6-month intervals. Our patients demonstrated increased beta-thromboglobulin, platelet factor 4, and fibrinogen compared with age-matched controls. Eight patients developed progression of carotid stenosis, and this group had higher baseline low-density lipoprotein (LDL) and fibrinogen than the 30 nonprogressing patients. Multiple regression analyses of age, sex, smoking, coronary artery disease, peripheral vascular disease, diabetes, hypertension, and baseline high-density lipoprotein (HDL), HDL2, HDL3, LDL, beta-thromboglobulin, platelet factor 4, and fibrinogen identified coronary artery disease and elevated LDL and fibrinogen as the only independent variables significantly associated with the progressing group. We conclude that, in patients with carotid atherosclerosis, a combination of coronary artery disease and elevated LDL and fibrinogen will predict with 88% accuracy whether the patient will have progressing carotid stenosis.