Coronary Microvascular function, Peripheral Endothelial Function and Carotid IMT in beta-thalassemia minor
Related Experiment Video
Updated: May 11, 2026
Non-invasive Assessment of Microvascular and Endothelial Function
Published on: January 29, 2013
Hakan Gullu1, Mustafa Caliskan, Zuhal Caliskan
1Baskent University, Teaching and Medical Research Centers, Cardiology Department, Adana and Konya, Turkey.
Insights
Patients with Beta thalassemia minor show impaired coronary microvascular function and arterial health. This study found reduced coronary flow reserve and brachial artery flow-mediated dilation, alongside increased carotid intima-media thickness in these patients.
Area of Science:
- Cardiology
- Vascular Biology
- Hematology
Background:
- Cardiovascular disease is more prevalent in thalassemia patients.
- Potential mechanisms include platelet activation, LDL oxidation, and nitric oxide destruction.
Purpose of the Study:
- To investigate coronary flow reserve (CFR), brachial artery flow-mediated dilation (FMD), and carotid intima-media thickness (IMT) in patients with Beta thalassemia minor (BTM).
Main Methods:
- Forty patients with BTM and 35 healthy controls were enrolled.
- Coronary flow reserve, brachial artery FMD, and carotid artery IMT were measured in all participants.
Main Results:
- Beta thalassemia minor patients exhibited significantly lower CFR (2.57 ± 0.46 vs. 3.07 ± 0.48, P < 0.0001).
- Brachial artery FMD was significantly reduced (6.22 ± 4.29% vs. 8.10 ± 4.00%, P = 0.01).
- Carotid IMT was significantly increased (0.57 ± 0.07 vs. 0.54 ± 0.04, P = 0.04).
Conclusions:
- Coronary microvascular function, assessed by CFR, is impaired in BTM patients.
- Brachial artery FMD is decreased, indicating endothelial dysfunction.
- Increased carotid IMT suggests early atherosclerotic changes in BTM.
Unlabelled:
Higher prevalence of cardiovascular disease in Thalassemia patients have been known. Potential mechanisms are enhanced platelet activation, LDL oxidation, macrophage activation, and increased nitric oxide destruction. We have investigated coronary flow reserve (CFR), brachial artery flow mediated dilation (FMD) and Carotid intima-media thickness (IMT) in patients with Beta thalessemia minor (BTM).
Methods:
Forty patients with BTM and 35 healthy control subjects were included. In all subjects CFR, brachial artery FMD, carotid artery IMT were measured.
Results:
CFR measurements: Coronary baseline diastolic peak flow velocity (DPFV) of left anterior descending coronary artery (LAD) was significantly higher in the BTM group (23.8 ± 3.9 vs. 22.1 ± 3.0, P = 0.04). However, hyperemic DPFV was significantly lower (61.1 ± 13.0 vs. 68.2 ± 14.2, P = 0.02), and CFR was significantly lower (2.57 ± 0.46 vs. 3.07 ± 0.48, P < 0.0001) in the BTM group than that in the control group. Brachial artery FMD and carotid IMT measurements: Percent FMD measurements were significantly lower in the BTM group than that in the controls (6.22 ± 4.29 vs. 8.10 ± 4.00, P = 0.01). Carotid IMT measurements were significantly but slightly higher in the BTM group than that in the controls (0.57 ± 0.07 vs. 0.54 ± 0.04, P = 0.04).
Conclusion:
CFR reflecting coronary microvascular function and brachial artery FMD are decreased, and carotid IMT is increased in patients with BTM.
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