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Evaluation of Arterial Stiffness and Subfoveal Choroidal Thickness in Patients with Coronary Slow Flow
Zekeriya Dogan1, Cigdem Ileri2, Beste Ozben1
1Department of Cardiology, Marmara University School of Medicine.
Insights
Coronary slow flow is linked to increased arterial stiffness and thinner choroid layers, suggesting it may be a sign of a systemic microvascular disorder affecting the entire arterial system.
Area of Science:
- Cardiovascular Medicine
- Ophthalmology
- Vascular Biology
Background:
- Coronary slow flow (CSF) may indicate a broader arterial system issue, not just localized to coronary arteries.
- Systemic microvascular dysfunction is increasingly recognized as a contributor to cardiovascular events.
Purpose of the Study:
- To investigate peripheral arterial stiffness and choroidal thickness in patients with CSF.
- To explore the relationship between CSF, arterial stiffness, and ocular microvasculature.
Main Methods:
- Fifty CSF patients and 25 controls underwent coronary angiography.
- Peripheral arterial stiffness was assessed using the Mobil-O-Graph system.
- Choroidal thickness was measured via enhanced depth imaging optical coherence tomography.
Main Results:
- CSF patients exhibited higher peripheral systolic blood pressure, pulse pressure, central pulse pressure, and pulse wave velocity (PWV).
- CSF patients had significantly thinner choroidal thickness compared to controls.
- CSF was an independent predictor of increased PWV and reduced choroidal thickness.
Conclusions:
- Increased peripheral arterial stiffness (PWV) and thinner choroid in CSF patients suggest a systemic microvascular disorder.
- CSF may represent a coronary manifestation of a widespread vascular issue.
- Further research into systemic implications of CSF is warranted.
Background:
Coronary slow flow may not only affect the coronary arteries, but it may also be a vascular problem affecting the rest of the arterial system.
Objective:
The aim of this study was to determine peripheral arterial stiffness and the thickness of the choroid layer in patients with slow coronary flow.
Methods:
Fifty consecutive patients (age, 54.3 ± 11.4 years, 38 male) with coronary slow flow and 25 consecutive patients (age, 50.5 ± 9.9 years, 16 male) with normal coronary arteries both documented by coronary angiography were included. Arterial stiffness parameters were measured noninvasively using a Mobil-O-Graph arteriography system. The choroidal thickness was assessed using the enhanced depth imaging optical coherence tomography method.
Results:
The patients with coronary slow flow had significantly higher peripheral systolic blood pressure, peripheral pulse pressure, central pulse pressure, and pulse wave velocity (PWV) and significantly thinner choroidal thickness compared to the controls. Thrombolysis in myocardial infarction frame count was positively correlated with PWV (r: 0.237, p = 0.041) and negatively correlated with choroidal thickness (r: -0.249, p = 0.031). There was also a negative correlation between PWV and mean choroidal thickness (r: -0.565, p < 0.001). Linear regression analysis showed that coronary slow flow was an independent predictor of both PWV and choroidal thickness when adjusted by age and sex.
Conclusions:
The acceleration of average peripheral arterial PWV with a thinning of choroidal thickness in patients with coronary slow flow may support the idea that this phenomenon may be a coronary presentation of a systemic microvascular disorder.
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