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Higher blood clotting -- main cause of Long COVID syndrome, study finds
Clotting markers were significantly elevated in the blood of patients with Long COVID syndrome compared with healthy controls.
Ireland: A study led by researchers from RCSI University of Medicine and Health Sciences showed that higher measures of blood clotting is common in patients with Long COVID syndrome. This may explain their persistent symptoms such as fatigue and reduced physical fitness. The study is published in the Journal of Thrombosis and Haemostasis.
In Long COVID syndrome, symptoms can last weeks to months after the initial infection has resolved and is estimated to affect millions of people worldwide.
Previously, the same group of researchers had studied the dangerous clotting observed in patients with severe acute COVID-19. However, not much is known about Long COVID syndrome.
The researchers examined 50 patients with symptoms of Long COVID syndrome to better understand if abnormal blood clotting is involved.
They discovered that clotting markers were significantly elevated in the blood of patients with Long COVID syndrome compared with healthy controls. These clotting markers were higher in patients who required hospitalization with their initial COVID-19 infection, but they also found that even those who were able to manage their illness at home still had persistently high clotting markers.
The researchers observed that higher clotting was directly related to other symptoms of Long COVID syndrome, such as reduced physical fitness and fatigue. Even though markers of inflammation had all returned to normal levels, this increased clotting potential was still present in Long COVID patients.
"Because clotting markers were elevated while inflammation markers had returned to normal, our results suggest that the clotting system may be involved in the root cause of Long COVID syndrome," said Dr Helen Fogarty, the study's lead author, ICAT Fellow and PhD student at the Irish Centre for Vascular Biology in the RCSI School of Pharmacy and Biomolecular Sciences.
This work was funded by the Welcome Trust, the Health Research Board (HRB) Irish Clinical Academic Training (ICAT) program as well as the HRB-funded Irish COVID-19 Vasculopathy Study (ICVS). The work was also supported by a philanthropic grant from the 3M Foundation to RCSI University of Medicine and Health Sciences in support of COVID-19 research.
"Understanding the root cause of a disease is the first step toward developing effective treatments," said Professor James O'Donnell, Director of the Irish Centre for Vascular Biology, RCSI and Consultant Haematologist in the National Coagulation Centre in St James's Hospital, Dublin.
"Millions of people are already dealing with the symptoms of Long COVID syndrome, and more people will develop Long COVID as the infections among the unvaccinated continue to occur. It is imperative that we continue to study this condition and develop effective treatments."
Reference:
The study titled, "Persistent Endotheliopathy in the Pathogenesis of Long COVID Syndrome," is published in the Journal of Thrombosis and Haemostasis.
https://onlinelibrary.wiley.com/doi/10.1111/jth.15490
Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751