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Increased red blood cell deformability and decreased aggregation as potential adaptive mechanisms in the slow

Yalin Tolga Yaylali1, Ibrahim Susam, Erdem Demir

  • 1Department of Cardiology, Faculty of Medicine, Pamukkale University, Denizli, Turkey. yaylalimd@gmail.com

Coronary Artery Disease
|November 1, 2012
PubMed

Insights

Slow coronary flow phenomenon (SCFP) is linked to altered red blood cell (RBC) properties. Patients with SCFP exhibit increased RBC deformability and decreased RBC aggregation, suggesting these hemorheological changes may be adaptive mechanisms.

Area of Science:

  • Cardiology
  • Hematology
  • Biophysics

Background:

  • The pathophysiology of slow coronary flow phenomenon (SCFP) remains unclear, with no established treatment consensus.
  • Rheological factors are known to influence the clinical progression of cardiovascular diseases.
  • Understanding blood's intrinsic properties is crucial for investigating SCFP.

Purpose of the Study:

  • To investigate the hemorheological properties, specifically red blood cell (RBC) characteristics, in patients with SCFP.
  • To compare RBC deformability, aggregation, whole-blood viscosity, and plasma viscosity between SCFP patients and healthy controls.

Main Methods:

  • Included 26 patients with angiographically confirmed SCFP and 30 healthy controls.
  • Measured RBC deformability, RBC aggregation (index, half-time, amplitude), whole-blood viscosity (native and standard hematocrit), and plasma viscosity.
  • Statistical analysis employed Mann-Whitney U-test, unpaired t-test, and χ-test.

Main Results:

  • SCFP patients had a significantly higher mean thrombolysis in myocardial infarction frame count compared to controls.
  • Significantly increased RBC deformability was observed in SCFP patients across five shear rates.
  • RBC aggregation index was lower in SCFP patients, while aggregation half-time and amplitude showed no significant differences.

Conclusions:

  • SCFP is associated with enhanced red blood cell (RBC) deformability and reduced RBC aggregation.
  • These hemorheological alterations may represent beneficial adaptive mechanisms in the context of SCFP pathogenesis.
Abstract

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