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Thromboembolic events in polycythemia vera.

Martin Griesshammer1, Jean-Jacques Kiladjian2, Carlos Besses3

  • 1University Clinic for Hematology, Oncology, Hemostaseology and Palliative Care, Johannes Wesling Medical Center Minden, UKRUB, University of Bochum, Hans-Nolte-Straße 1, 32429, Minden, Germany. martin.griesshammer@muehlenkreiskliniken.de.

Annals of Hematology
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PubMed
Summary

Polycythemia vera (PV) significantly increases the risk of thromboembolic events and cardiovascular disease. Effective management focuses on reducing thrombosis risk through hematocrit control and appropriate therapies based on patient risk factors.

Keywords:
InterferonJAK inhibitorsPolycythemia veraThromboembolic eventsThrombosis

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Area of Science:

  • Hematology
  • Oncology
  • Cardiovascular Medicine

Background:

  • Thromboembolic events and cardiovascular disease are primary complications in polycythemia vera (PV).
  • Vascular complications often lead to PV diagnosis, with highest thrombosis rates near diagnosis.
  • Key risk factors include age (≥60), prior thrombosis, elevated hematocrit, and leukocytosis.

Purpose of the Study:

  • To review factors contributing to thrombosis in PV patients.
  • To discuss current and emerging treatments for thrombosis risk reduction.
  • To highlight the need for further research on optimal cytoreductive therapies.

Main Methods:

  • Review of existing literature on PV, thrombosis, and treatment strategies.
  • Analysis of risk factors and their association with thrombotic events.
  • Discussion of therapeutic approaches including phlebotomy, aspirin, and cytoreductive agents.

Main Results:

  • Therapeutic goal is hematocrit <45% to reduce cardiovascular death and thrombosis.
  • Low-risk patients managed with phlebotomy and aspirin.
  • High-risk patients require cytoreductive agents, with hydroxyurea as first-line and interferon/ruxolitinib as second-line.

Conclusions:

  • Controlling hematocrit is crucial for reducing thrombosis in PV.
  • Risk stratification guides treatment decisions between phlebotomy/aspirin and cytoreductive therapies.
  • Further controlled studies are needed to optimize cytoreductive strategies for thrombosis prevention in PV.