Retrobulbar and peripheral capillary blood flow in hypercholesterolemic subjects

Area of Science:

• Vascular Physiology
• Cardiovascular Research
• Metabolic Disorders

Background:

• Primary hypercholesterolemia is a significant risk factor for cardiovascular disease.
• Endothelial dysfunction is a proposed mechanism contributing to vascular complications in hypercholesterolemia.
• Assessing blood flow in accessible vascular beds may offer insights into subclinical vascular changes.

Purpose of the Study:

• To evaluate retrobulbar and finger nailfold capillary blood flow velocities in hypercholesterolemic subjects.
• To determine the impact of lipid-lowering therapy on these blood flow parameters.
• To investigate potential vascular dysregulation in primary hypercholesterolemia.

Main Methods:

• Comparative assessment of retrobulbar and nailfold capillary blood flow velocities.
• Inclusion of 15 hypercholesterolemic patients and 15 age/sex-matched controls.
• Evaluation of blood flow changes after a 3-month lipid-lowering therapy intervention.

Main Results:

• No significant alterations in retrobulbar blood flow velocities were observed post-therapy.
• Nailfold capillary blood flow velocity was significantly slower in hypercholesterolemic subjects compared to controls after cooling.
• This nailfold capillary vascular dysregulation did not improve with lipid-lowering therapy.

Conclusions:

• Hypercholesterolemia may be associated with altered blood flow in nailfold capillaries, potentially due to endothelial dysfunction.
• Retrobulbar vessels did not exhibit similar blood flow alterations in this cohort.
• Current lipid-lowering therapy did not demonstrate a significant effect on the measured blood flow parameters in these vascular beds.