Health
Recovery of Covid patients at high risk of developing blood clots
According to one study, people who have recovered from Covid-19 may be at risk of developing blood clots due to a “prolonged excessive immune response.”
People with existing cardiovascular disease, including high blood pressure, are said to be at greatest risk.
A team of researchers collected and analyzed blood samples from 30 patients one month after recovering from the infection and being discharged from the hospital.
They found that all patients who recovered had signs of vascular injury.
They had twice as many circulating endothelial cells (CECs) (lining all blood vessels) as they were shed from the damaged vessel wall.
Researchers also found that recovered patients continue to produce high levels of cytokines, proteins produced by immune cells that activate the immune response to pathogens, even in the absence of the virus.
An unusually large number of immune cells, known as T cells, that attack and destroy the virus were also present in the blood.
read more: Covid created “Perfect Storm” for increased cardiac death
The presence of both cytokines and high levels of immune cells suggests that the immune system of recovered patients remains activated even after the virus is gone.
Researchers at the Lee Contian School of Medicine in Singapore have found that these persistently activated immune responses may attack blood vessels in restored Covid patients, causing more damage and further increasing the risk of thrombosis. Is assumed.
They may help explain why some people who have recovered from the virus show symptoms of blood coagulation complications after the initial recovery.
In some cases, blood clots block major arteries to important organs, increasing the risk of heart attack, stroke, and organ failure.
At the University of Glasgow, research is underway to investigate the effects of Covid on blood vessels.
I will look at what was collected on a regular basis health Records of people in western Scotland who went to the hospital between April 2020 and April 2021 or tested positive for Covid-19.
Assistant Professor Christine Cheung, who led the study in Singapore, said: “As more people recovered from Covid-19, I started asking clinicians about patients who returned with blood clot problems after being discharged from the hospital and the virus cleared.
“This is a powerful case for close monitoring of recovered Covid-19 patients, especially those with pre-existing cardiovascular disease such as hypertension and diabetes.
“People with cardiovascular disease need to be more careful because the underlying disease has already weakened the vascular system.
“This is a double blow of Covid-19.”
Florence Chioh, the lead author of this study, adds: “Covid-19 is primarily a respiratory infection, but the virus can attack the inner walls of blood vessels, causing inflammation and damage.
“Leakage from these damaged blood vessels can cause the formation of blood clots, which can lead to complications such as those seen in patients during hospitalization.”
The research team said important findings in this study could help provide guidelines for post-hospital care for patients who may be susceptible to “long covid” symptoms.
The study was published in the peer-reviewed scientific journal eLife on March 23.
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