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Erythrocyte deformability in young familial hypercholesterolemics
A Vayá1, M Martínez, M Guillén
1Department of Clinical Pathology, La Fé Hospital, Valencia, Spain.
Clinical Hemorheology and Microcirculation
|November 7, 1998
Summary
Young familial hypercholesterolemia (FH) does not impair red blood cell deformability in children without vascular damage. Dyslipidemia alone does not affect erythrocyte rheological properties in these subjects.
Area of Science:
- Cardiology
- Hematology
- Biophysics
Background:
- Familial hypercholesterolemia (FH) is a genetic disorder leading to high cholesterol levels.
- Early detection of vascular changes in young FH patients is crucial.
- Red blood cell (RBC) deformability is a key factor in microvascular function.
Purpose of the Study:
- To investigate if young FH children without atherosclerotic lesions have reduced erythrocyte deformability.
- To assess the impact of FH-related dyslipidemia on RBC rheological properties.
Main Methods:
- Erythrocyte elongation index (EEI) was measured using a shear stress diffractometer (Rheodyn SSD).
- EEI was determined in 24 children with heterozygous FH and their affected parents, compared to healthy controls.
- Measurements were taken at various shear stresses (6, 12, 30, 60 Pa).
Main Results:
- No statistically significant differences in EEI were observed between FH children and controls.
- No significant differences in EEI were found between FH parents and their respective controls.
- No correlations were found between EEI and plasma lipids or lipoproteins.
Conclusions:
- Young familial hypercholesterolemic subjects without detectable vascular deterioration exhibit normal erythrocyte deformability.
- Dyslipidemia in FH, in the absence of vascular damage, does not appear to compromise RBC rheological properties.