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Updated: Aug 18, 2026

Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
Platelet function disorder in patients with coronary slow flow
Mustafa Gökçe1, Sahin Kaplan, Yavuz Tekelioğlu
1Department of Cardiology, Karadeniz Technical University, Faculty of Medicine, Trabzon, Turkey. mustgokce@yahoo.com
Insights
Patients with coronary slow flow phenomenon (CSFP) exhibit increased platelet aggregability. This finding suggests platelet function may play a role in CSFP, a condition affecting coronary artery blood flow.
Area of Science:
- Cardiology
- Hematology
- Vascular Biology
Background:
- Coronary slow flow phenomenon (CSFP) is observed in some patients with chest pain and normal coronary arteries.
- The exact cause of CSFP remains unclear.
- CSFP involves delayed dye flow in epicardial coronary arteries during angiography.
Purpose of the Study:
- To investigate potential platelet function disorders in patients diagnosed with CSFP.
- To determine if altered platelet aggregability is associated with CSFP.
Main Methods:
- Compared 24 patients with CSFP (using TIMI frame count) to 23 controls with normal coronary flow.
- Measured platelet aggregability in response to ristocetin, collagen, and adenosine diphosphate (ADP).
Main Results:
- Platelet aggregability was significantly higher in patients with CSFP compared to controls.
- Increased aggregation was noted for ristocetin, collagen, and ADP stimuli.
- Statistical significance was achieved with p < 0.05.
Conclusions:
- Platelet aggregability is elevated in individuals with coronary slow flow phenomenon.
- This suggests a potential link between platelet hyperactivity and the pathophysiology of CSFP.
Background:
Some patients evaluated for chest pain with angiographically normal coronary arteries show coronary slow flow phenomenon (CSFP) on angiography. Slow flow of dye in epicardial coronary arteries is also not an infrequent finding in patients during routine coronary angiography. The precise pathophysiology of CSFP is not known yet.
Hypothesis:
This study investigates the presence of platelet function disorders in patients with CSFP.
Methods:
The patient group included 24 patients with CSFP detected by coronary angiography via the TIMI "frame count" method, and a control group included 23 patients with normal coronary flow. Platelet aggregability induced by use of ristocetin, collagen, and adenosine diphosphate (ADP), was measured from all blood samples in both control and patient groups.
Results:
The ratio of platelet aggregability increased significantly in patients with CSFP compared with patients with normal coronary flow (ristocetin 57.6 +/- 15 vs. 45.4 +/- 17.1, collagen 62.9 +/- 16.4 vs. 48.9 +/- 25.3, ADP 59.4 +/- 18 vs. 42.4 +/- 15.2, p < 0.05).
Conclusion:
Platelet aggregability is increased in patients with CSFP.
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