Impaired blood rheology: a risk factor after stroke?

Area of Science:

• Neurology
• Cardiovascular Science
• Hematology

Background:

• Stroke is a leading cause of long-term disability and mortality.
• Predicting recurrent stroke risk is crucial for effective patient management.
• The role of hemorheological parameters in stroke prognosis requires further investigation.

Purpose of the Study:

• To prospectively evaluate the prognostic value of blood rheology in patients during the rehabilitation phase after stroke.
• To determine if specific rheological factors can predict the occurrence of a second stroke.

Main Methods:

• A prospective study involving 523 stroke patients in the rehabilitation phase.
• Assessment of blood viscosity, serum viscosity, plasma viscosity, hematocrit, fibrinogen, red cell aggregation, red cell deformability, erythrocyte sedimentation rate (ESR), white blood cell count, cholesterol, and triglycerides.
• Follow-up for 2 years to record endpoints, defined as a second stroke (fatal or non-fatal).

Main Results:

• Patients who experienced a second stroke within 2 years showed significantly elevated levels of blood viscosity, red cell aggregation, plasma viscosity, serum viscosity, fibrinogen, and cholesterol compared to those without recurrent events.
• These findings suggest a strong association between specific rheological properties and stroke recurrence.

Conclusions:

• Rheological factors, including blood viscosity and red cell aggregation, are significantly associated with the prognosis of patients after a first stroke.
• These parameters may serve as valuable biomarkers for identifying individuals at higher risk of recurrent stroke.
• Further research could explore therapeutic strategies targeting these rheological abnormalities to improve stroke outcomes.