18 Resources


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ISTH's World Thrombosis Day 2025: From Head to Toe, Take Control
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18 Sep 2025

International Society on Thrombosis and Haemostasis

ISTH's World Thrombosis Day 2025: From Head to Toe, Take Control

Every year on 13 October, the International Society on Thrombosis and Haemostasis (ISTH) leads World Thrombosis Day (WTD), a global campaign dedicated to raising awareness of thrombosis, commonly known as blood clots. Thrombosis is a leading cause of death and disability worldwide, contributing to the deaths of 1 in 4 people each year.The 2025 campaign theme, “From Head to Toe, Take Control: Pre...

18 Sep 2025



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American Society of Hematology/International Society on Thrombosis and Haemostasis 2024 updated guidelines for treatment of venous thromboembolism in pediatric patients
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International Society on Thrombosis and Haemostasis

American Society of Hematology/International Society on Thrombosis and Haemostasis 2024 updated guidelines for treatment of venous thromboembolism in pediatric patients

Publication

22 Jul 2025

The International Society on Thrombosis and Haemostasis (ISTH) and the American Society of Hematology (ASH) released updated clinical practice guidelines for the treatment of pediatric venous thromboembolism (VTE).&nbsp;The guidelines, published in ASH’s peer-reviewed journal&nbsp;Blood Advances, were developed by an expert panel following a rigorous review process. They aim to improve health ou...

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2025 focused update of the 2020 ISTH guidelines for management of thrombotic thrombocytopenic purpura
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International Society on Thrombosis and Haemostasis

2025 focused update of the 2020 ISTH guidelines for management of thrombotic thrombocytopenic purpura

Publication

22 Jul 2025

The International Society on Thrombosis and Haemostasias (ISTH) has published updated guidelines for the management of thrombotic thrombocytopenic purpura (TTP). The updates to this guideline, originally published in 2020, aim to standardize the therapeutic approach at an international level. In turn, this will increase access to care, reduce hospitalizations and ultimately lower mortality rates f...

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Acute pulmonary embolism in children and adolescents in the USA (2016 and 2019): a nationwide retrospective cohort study
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International Society on Thrombosis and Haemostasis

Acute pulmonary embolism in children and adolescents in the USA (2016 and 2019): a nationwide retrospective cohort study

Publication

24 May 2025

A new study published in The Lancet Respiratory Medicine provides critical insights into the incidence and outcomes of acute pulmonary embolism (PE) among children and adolescents, filling a longstanding gap in epidemiological data on this serious condition. The paper, which includes several authors from the ISTH global community, analyzed nationwide U.S. hospital admission data from 2016 and 2019...

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ISTH Guidelines for Treatment of Von Willebrand Disease
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International Society on Thrombosis and Haemostasis, test, test

ISTH Guidelines for Treatment of Von Willebrand Disease

Publication

22 May 2025

The American Society of Hematology (ASH), the International Society on Thrombosis and Haemostasis (ISTH), National Hemophilia Foundation (NHF) and World Federation of Hemophilia (WFH)&nbsp;have developed joint clinical practice guidelines on the diagnosis and management of von Willebrand Disease (VWD), the world's most common inherited bleeding disorder.

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Understanding Thrombosis: Types and Risk Factors
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International Society on Thrombosis and Haemostasis

Understanding Thrombosis: Types and Risk Factors

Briefs & Fact Sheets

08 May 2025

This World Thrombosis Day fact sheet explains the differences between arterial and venous thrombosis and identifies risk factors for both conditions. The resource provides essential information for patients and healthcare professionals to understand, recognize and prevent potentially dangerous blood clots.

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Thrombosis: a major contributor to the global disease burden
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International Society on Thrombosis and Haemostasis (ISTH)

Thrombosis: a major contributor to the global disease burden

Publication

11 Oct 2024

This paper, published by the World Thrombosis Day steering committee did a systematic review of the global disease burden of VTE as a cause of death and disability.&nbsp;

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Understanding Pediatric Thrombosis 
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International Society on Thrombosis and Haemostasis (ISTH), Louise Bannon

Understanding Pediatric Thrombosis

Fact sheet

10 Oct 2024

This fact sheet on pediatric thrombosis provides a comprehensive overview of blood clots in children, covering the key signs, symptoms, diagnosis, and treatment. This fact sheet is a resource from the World Thrombosis Day campaign, the global advocacy initiative of the International Society on Thrombosis and Haemostasis (ISTH).

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 ISTH Releases Evidence-Based Clinical Practice Guideline for Hemophilia Treatment
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09 Aug 2024

NCD Alliance

ISTH Releases Evidence-Based Clinical Practice Guideline for Hemophilia Treatment

CHAPEL HILL, NC, USA, June 21, 2024 - The International Society on Thrombosis and Haemostasis (ISTH), the leading international professional medical-scientific organization dedicated to advancing the understanding, prevention, diagnosis, and treatment of conditions related to thrombosis and hemostasis, has published the first clinical practice guideline utilizing strict GRADE methodology for the t...

09 Aug 2024



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Fact Sheet: Understanding Pulmonary Embolism (PE) 
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International Society on Thrombosis and Haemostasis

Fact Sheet: Understanding Pulmonary Embolism (PE)

Fact sheet

07 Aug 2024

The International Society on Thrombosis and Haemostasis (ISTH) has created a comprehensive fact sheet on Pulmonary Embolism (PE). This resource provides essential information about the condition, including its causes, risk factors, signs and symptoms.&nbsp;It is designed to be a valuable resource for both healthcare professionals and the general public, offering clear and concise information to he...

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Understanding Deep Vein Thrombosis (DVT) 
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International Society on Thrombosis and Haemostasis

Understanding Deep Vein Thrombosis (DVT)

Fact sheet

07 Aug 2024

The International Society on Thrombosis and Haemostasis (ISTH) has created a comprehensive fact sheet on deep vein thrombosis (DVT). This resource provides essential information about the condition, including the signs, symptoms and risk factors. It is designed to be a resource for both healthcare professionals and the general public, offering clear and concise information to help understand this...

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