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Ethnic differences in macrovascular and microvascular function in systolic heart failure
Eduard Shantsila1, Benjamin Wrigley, Alena Shantsila
1University of Birmingham Centre for Cardiovascular Sciences, City Hospital, Birmingham, UK. e.shantsila@bham.ac.uk
Circulation. Heart Failure
|September 15, 2011
Summary
South Asians with heart failure (HF) exhibit impaired endothelial function, particularly microvascular dysfunction. Ethnicity significantly impacts endothelial function in HF patients, highlighting ethnic disparities in cardiovascular disease.
Area of Science:
- Cardiovascular Medicine
- Endothelial Biology
- Ethnic Health Disparities
Background:
- Endothelial dysfunction is a key factor in heart failure (HF) pathophysiology.
- South Asians (SAs) experience a disproportionate burden of cardiovascular disease, but data on endothelial function in HF are limited.
Purpose of the Study:
- To investigate ethnic differences in endothelial function among patients with systolic heart failure.
Main Methods:
- Cross-sectional study of 128 systolic HF patients (50 SAs, 50 whites, 28 African Caribbeans).
- Assessed macrovascular endothelial function (flow-mediated dilation - FMD), arterial stiffness (pulse-wave velocity), and microvascular endothelial function (forearm laser Doppler flowmetry).
- Compared HF patients with disease controls and healthy controls.
Main Results:
- South Asians with HF showed impaired microvascular response to acetylcholine and reduced FMD compared to controls.
- Significant ethnic differences observed: SAs and African Caribbeans had poorer acetylcholine response than whites; whites had higher FMD than SAs and African Caribbeans.
- Ethnicity remained a significant predictor of microvascular endothelial function after adjusting for clinical factors.
Conclusions:
- South Asians with heart failure exhibit impaired microvascular and macrovascular endothelial function.
- Significant ethnic variations in endothelial function exist in heart failure patients.
- Ethnicity is independently associated with microvascular endothelial dysfunction in heart failure.
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