Mary Wilson
Well-known member
International Society on Thrombosis and Haemostasis
Updated 20 April, 2021
Step 1: Who is at risk for VITT?
1) COVID-19 vaccination 4-28 days prior to onset of symptoms?
- VITT has only been identified following AstraZeneca or Johnson & Johnson vaccine. It has not been identified after other vaccines.
2) Signs/symptoms suggestive of thromboembolism?
Examples include (but not limited to) NEW ONSET:
- Severe, persistent headache +/- vision change, seizure-like activity? Severe, persistent abdominal pain
- Leg swelling or pain
- Chest pain and/or shortness of breath
If answers to questions 1 and/or 2 are no, then this is not VITT. Manage clinical presentation according to standard practice.
- If answers to both questions are yes, then proceed to Step 2.
Step 2: How to screen for VITT in at risk patients?
...
https://isth.informz.net/ISTH/data/images/ISTH VITT Guidance 2.pdf
Updated 20 April, 2021
Step 1: Who is at risk for VITT?
1) COVID-19 vaccination 4-28 days prior to onset of symptoms?
- VITT has only been identified following AstraZeneca or Johnson & Johnson vaccine. It has not been identified after other vaccines.
2) Signs/symptoms suggestive of thromboembolism?
Examples include (but not limited to) NEW ONSET:
- Severe, persistent headache +/- vision change, seizure-like activity? Severe, persistent abdominal pain
- Leg swelling or pain
- Chest pain and/or shortness of breath
If answers to questions 1 and/or 2 are no, then this is not VITT. Manage clinical presentation according to standard practice.
- If answers to both questions are yes, then proceed to Step 2.
Step 2: How to screen for VITT in at risk patients?
...
https://isth.informz.net/ISTH/data/images/ISTH VITT Guidance 2.pdf