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Updated: Nov 8, 2025

Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
Published on: May 2, 2025
Impact of electric cardioversion on platelet activation
Harald Haidl1, Johanna Gaugler1, Gerhard Cvirn2
1Division of General Paediatrics, Department of Paediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria.
Insights
Electric cardioversion (EC) does not increase platelet activation or blood clotting risk in atrial fibrillation (AF) patients. This study found no significant changes in platelet markers after EC, suggesting it is safe for AF management.
Area of Science:
- Cardiology
- Hematology
Background:
- Atrial fibrillation (AF) significantly increases stroke risk, persisting even after rhythm restoration.
- Evaluating the impact of cardioversion on thrombotic risk factors is crucial for patient management.
Purpose of the Study:
- To assess the effect of electric cardioversion (EC) on platelet activation and procoagulatory tendency in patients with AF.
Main Methods:
- Platelet activation was measured using flow cytometry and Multiplate® impedance aggregometry.
- Serum levels of platelet factor 4 (PF4) and ß-thromboglobulin (ß-TG) were quantified.
- Measurements were taken before and after EC in 10 AF patients.
Main Results:
- No significant changes were observed in P-selectin expression or integrin αIIbβ3 activation post-EC.
- Serum levels of PF4 and ß-TG remained stable before and after the procedure.
- Platelet aggregation assays showed no significant alterations after EC.
Conclusions:
- Electric cardioversion does not appear to influence platelet activation markers or procoagulatory tendency.
- These findings support the safety of EC in AF patients regarding thrombotic risk.
Introduction:
Atrial fibrillation (AF) comes along with high risk of stroke. This risk continues even after re-establishing sinus rhythm with cardioversion. Aim of this study is to evaluate the contribution of electric cardioversion (EC) to platelet activation and procoagulatory tendency.
Methods:
Extent of platelet activation before and after electric cardioversion was quantified using flow cytometry, impedance aggregation measurements with Multiplate®, and quantification of serum levels of platelet factor 4 (PF4) and ß-thromboglobulin (ß-TG) in patients with AF (N = 10).
Results:
No significant differences were observed in any of the measured parameters comparing the values from before and after cardioversion. Geometric means of P-selectin expression and integrin αIIbβ3 activation were 0.27 (+/- 0.07) and 2.30 (+/- 2.61) before EC and 0.28 (+/- 0.17) and 1.67 (+/- 1.82) after EC. Levels of ß-TG were 110.11 ng/ml (+/- 3.78) before and 110.51 ng/ml (+/- 2.56) after EC, levels of PF4 were 35.64 ng/ml (+/- 12.94) before and 32.40 ng/ml (+/- 4.95) after EC. Platelet aggregation triggered with adenosine diphosphate (ADP), arachidonic acid, collagen, Ristocetin, or thrombin receptor activating peptide (TRAP) revealed results within the normally expected ranges without significant changes before and after EC.
Discussion:
Electric cardioversion has no influence on platelet activation markers which is in agreement with other studies reporting electrical cardioversion to be safe.
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