Evidence map›Paper›PMID 35512906›Full record

ReviewSeminars in hematology2022

Treatment of vaccine-induced immune thrombotic thrombocytopenia (VITT).

Nadia Gabarin, Donald M Arnold, Ishac Nazy, Theodore E Warkentin

Open access · hybridAbstract readCase ReportsReview
In one paragraph

Review in Seminars in hematology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
9.6field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 46 citations in OpenAlex.

  1. Classification of Platelet-Activating Anti-Platelet Factor 4 Disorders.International journal of laboratory hematology · 2026
    Review
  2. Review
  3. Article
  4. Review
  5. Anti-Platelet factor 4 immunothrombosis-not just heparin and vaccine triggers.Research and practice in thrombosis and haemostasis · 2025
    Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Autoimmune Heparin-Induced Thrombocytopenia.Journal of clinical medicine · 2023
    Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Nadia GabarinDepartment of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada.
Donald M ArnoldDepartment of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster Center for Transfusion Research, McMaster University, Hamilton, Ontario, Canada; Service of Benign Hematology, Department of Medicine, Hamilton Health Sciences, Hamilton, Ontario Canada.
Ishac NazyDepartment of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster Center for Transfusion Research, McMaster University, Hamilton, Ontario, Canada.
Theodore E WarkentinDepartment of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster Center for Transfusion Research, McMaster University, Hamilton, Ontario, Canada; Service of Benign Hematology, Department of Medicine, Hamilton Health Sciences, Hamilton, Ontario Canada; Department of Pathology and Molecular Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada; Transfusion Medicine, Hamilton Regional Laboratory Medicine Program, Hamilton, Ontario, Canada. Electronic address: twarken@mcmaster.ca.
McMaster University · CAHamilton Health Sciences · CAHamilton Regional Laboratory Medicine Program · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vaccine-induced immune thrombotic thrombocytopenia (VITT) is a novel prothrombotic disorder characterized by thrombosis, thrombocytopenia, and disseminated intravascular coagulation identified in hundreds of recipients of ChAdOx1 nCoV-19 (Oxford/AstraZeneca), an adenovirus vector coronavirus disease 2019 (COVID-19) vaccine. VITT resembles heparin-induced thrombocytopenia (HIT) in that patients have platelet-activating anti-platelet factor 4 antibodies; however, whereas heparin typically enhances platelet activation by HIT antibodies, VITT antibody-induced platelet activation is often inhibited in vitro by pharmacological concentrations of heparin. Further, the thrombotic complications in VITT feature much higher frequencies of atypical thrombosis, most notably cerebral vein thrombosis and splanchnic vein thrombosis, compared with HIT. In this review, we outline the treatments that have been used to manage this novel condition since its recognition in March 2021, including anticoagulation, high-dose intravenous immune globulin, therapeutic plasma exchange, corticosteroids, rituximab, and eculizumab. We discuss the controversial issue of whether heparin, which often inhibits VITT antibody-induced platelet activation, is harmful in the treatment of VITT. We also describe a case of "long VITT," describing the treatment challenges resulting from platelet-activating anti-PF4 antibodies that persisted for more than 9 months.

Indexed as

COVID-19COVID-19 VaccinesPurpura, Thrombocytopenic, IdiopathicThrombosisChAdOx1 nCoV-19HeparinHumansPlatelet Factor 4ChAdOx1 nCoV-19COVID-19 VaccinesHeparinPlatelet Factor 4HeparinHigh-dose immune globulin (IVIG)Long VITTTherapeutic plasma exchange (TPE)Vaccine-induced immune thrombotic thrombocytopenia (VITT)

Identifiers

PMID35512906
PMCPMC8898785
OpenAlexW4220741413

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.