Exclusion of Thrombocytopenia as a Contraindication for Invasive Radiofrequency Ablation in a Patient with Paroxysmal Atrial Fibrillation by Using Magnesium Anticoagulation Instead of EDTA: Another Case of Anticoagulant-Induced Pseudo-Thrombocytopenia

Authors

  • Peter Kohlschein Institute of Clinical Chemistry and Laboratory Medicine, Rostock University Medical Center, Rostock
  • Dietmar Bänsch Center of Internal Medicine, Department of Cardiology, Rostock University Medical Center, Rostock
  • Katrin Dreißiger Institute of Clinical Chemistry and Laboratory Medicine, Rostock University Medical Center, Rostock
  • Peter Schuff-Werner Institute of Clinical Chemistry and Laboratory Medicine, Rostock University Medical Center, Rostock

DOI:

https://doi.org/10.1532/hsf.1323

Abstract

Thrombocytopenia might be an exclusion criterion for invasive radiofrequency catheter ablation; therefore it is necessary to differentiate between pseudo-thrombocytopenia and a low platelet count due to other etiologies.

A 69-year-old female presented to the cardiology department with recurrent atrial fibrillation that was resistant to conventional drug treatment. The initial laboratory findings were within the normal ranges, except for low platelet counts that occurred without a specific bleeding history. The reason for thrombocytopenia was anticoagulant-induced in vitro aggregation of platelets in the presence of EDTA as well as in citrated blood samples. As recently communicated, magnesium anticoagulated blood samples prevent platelet aggregation in individuals with anticoagulant-associated pseudo-thrombocytopenia. Although its aggregation-inhibiting effect is known from previous clinical observations, magnesium sulphate has not been introduced as an anticoagulant in analytical medicine.

Based on our observations, blood anticoagulated with magnesium sulphate is recommended to verify low routine platelet counts before final clinical decisions are made. 

Published

2015-06-26

How to Cite

Kohlschein, P., Bänsch, D., Dreißiger, K., & Schuff-Werner, P. (2015). Exclusion of Thrombocytopenia as a Contraindication for Invasive Radiofrequency Ablation in a Patient with Paroxysmal Atrial Fibrillation by Using Magnesium Anticoagulation Instead of EDTA: Another Case of Anticoagulant-Induced Pseudo-Thrombocytopenia. The Heart Surgery Forum, 18(3), E090-E092. https://doi.org/10.1532/hsf.1323

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Articles