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[Hemorheological alterations in hypertensive patients]
Patricia Foresto1, Mabel D'Arrigo, Fernando Filippini
1Departamento de Bioquímica Clínica, Facultad de Ciencias Bioquímicas y Farmacéuticas (Instituto de Física CONICET-UNR). pforesto@arnet.com.ar
Medicina
|August 4, 2005
Summary
Hypertensive patients exhibit higher blood viscosity and abnormal erythrocyte aggregation compared to healthy individuals. These hemorheological changes, including increased fibrinogen, may contribute to vascular complications in hypertension.
Area of Science:
- Cardiovascular Physiology
- Hemodynamics
- Biomedical Engineering
Context:
- Hypertension is a global health concern associated with increased cardiovascular risk.
- Altered blood rheology, including viscosity and erythrocyte aggregation, is implicated in hypertensive pathophysiology.
- Understanding these hemorheological changes is crucial for managing hypertension and preventing complications.
Purpose:
- To investigate blood viscosity and the influence of plasmatic (fibrinogen) and cellular (erythrocyte aggregation) factors in hypertensive patients.
- To compare hemorheological parameters between non-diabetic hypertensive patients and normotensive controls.
- To identify specific rheological alterations contributing to hypertension.
Summary:
- Whole blood viscosity was significantly higher in hypertensive patients across all shear rates.
- Plasma viscosity differed significantly between groups only at low shear rates.
- Hypertensive patients displayed significantly higher erythrocyte aggregation (Aggregate Shape Parameter) and slightly elevated fibrinogen levels compared to controls.
Impact:
- The study highlights abnormal erythrocyte aggregation as a key factor in hypertension-related vascular complications.
- Findings suggest that hemorheological alterations, particularly increased erythrocyte aggregation and viscosity, are significant in hypertensive patients.
- This research provides insights into the rheological basis of hypertension, potentially informing therapeutic strategies.