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Nicotine-laden e-cigarettes raise a user's risk of blood clots, damage small blood vessels and can also raise heart rate and blood pressure, a new study finds.

The effects are similar to those caused by traditional cigarettes, and raise the concern that long-term vaping could help cause heart attacks or strokes, the Swedish research team warned.

"Our results suggest that using e-cig...

COVID-19 infection significantly increases the risk of dangerous blood clots after surgery, a new study finds.

Venous thromboembolism (VTE) is a potential complication of surgery in which blood clots form in the veins. It is a leading preventable cause of death in hospital patients.

This study found that VTEs were 50% more likely after surgery in patients with a current COVID infect...

Dispatching rapid-response medical teams to perform an emergency procedure on stroke patients significantly improves their chances of survival and a good recovery, according to a new study.

Researchers assessed a pilot program in New York City where a mobile interventional stroke team (MIST) raced to ischemic stroke patients to perform a surgical procedure called endovascular thrombectomy...

Anyone who's ever undergone knee replacement understands the real and troubling risk of post-op blood clots. Many patients are told take a daily blood thinner pill long after their procedure.

But a new study finds that a one-time injection of an experimental blood thinner called abelacimab may greatly reduce the odds for these clots in recovering knee replacement patients.

The rese...

When someone suffers a stroke, doctors can often remove the culprit clot obstructing blood flow to the brain. Now, a new study sheds light on why those successful procedures do not always translate into a good outcome.

Researchers found that when clot retrieval takes more than one attempt, stroke patients are more likely to still have some degree of disability three months later.

An...

Early in the pandemic, doctors began to note a heightened risk of sometimes deadly blood clots in people hospitalized with severe COVID-19, and they routinely began to prescribe blood thinners in these cases.

Is the same intervention needed for people sick at home with milder forms of COVID?

No, according to the results of a clinical trial whose results appeared so conclusive that ...

  • Ernie Mundell and Robert Preidt HealthDay Reporters
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  • June 23, 2021
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  • Full Page

Very rarely, blood clots can develop after COVID-19 vaccination, and doctors in Canada describe a new test and treatment for the condition in a case study of three patients.

All three developed the condition called vaccine-induced immune thrombotic thrombocytopenia (VITT) after receiving the AstraZeneca vaccine.

Two developed blood clots in their legs, and the third had blood clo...

Researchers have reported the first case of COVID-19 causing dangerous, recurring blood clots in a patient's arm.

The report offers new insight into how the damage of inflammation caused by COVID-19 can linger and how best to treat recurring clots, the Rutgers University researchers said.

There have been reports of lower extremity blood clots in patients after COVID-19, but this is ...

Serious cases of "long-haul COVID-19" are rare in patients who were not hospitalized after their infection, but these patients still report more doctor or health care visits after recovery,. Danish researchers report.

The new six-month study found that COVID patients who were not hospitalized had small increased risks of blood clots and breathing difficulties. They were also more likely t...

Certain blood types may increase a person's risk of different health problems, a new study suggests.

The research confirms some previous findings and reveals new links between blood types and diseases, according to the authors of the study published April 27 in the journal eLife.

"There is still very little information available about whether people with RhD-positive or RhD...

If you plan to resume running after an extended break due to the COVID-19 pandemic, you need to ease back in, one expert advises.

"There are a lot of good programs, including Couch to 5K or C25K, that focus on increasing running slowly up to about 3 miles or 30 minutes," said physical therapist Grace Neurohr, a running and bio-motion specialist for the Rubin Institute for Advanced Orthope...

The United States should resume administering the Johnson & Johnson COVID-19 vaccine, a key advisory panel for the Centers for Disease Control and Prevention voted on Friday.

The agency's Advisory Committee on Immunization Practices (ACIP) has determined that the benefits of the vaccine in preventing deaths and hospitalizations far outweigh the risks of rare blood clots, risks that are ma...

It may not be a good idea to take a daily low-dose aspirin if you're also taking a widely used class of blood thinners called direct oral anticoagulants (DOACs), researchers caution.

DOACs include drugs such as Eliquis (apixaban), Pradaxa (dabigatran), Lixiana (edoxaban) and Xarelto (rivaroxaban). They're used to help prevent strokes from atrial fibrillation or for the treatment of what's...

Among COVID-19 patients in intensive care units (ICUs), 2% suffer a stroke, a new study finds.

Of the two types of stroke, hemorrhagic stroke, which is caused by bleeding in the brain, was linked to a higher risk of death than ischemic stroke, which is caused by a blood clot in the brain. Data on just under 2,700 patients was used for the study.

"For people with severe COVID-19 requ...

While U.S. federal government experts probe potential risks of the Johnson & Johnson vaccine, what do you need to know if you have had the one-dose COVID shot or hope to get it?

Experts at the American Heart Association (AHA) describe what to look out for.

The U.S. Centers for Disease Control and Prevention and the U.S. Food & Drug Administration paused administration of the J&J (Ja...

The fate of Johnson & Johnson's coronavirus vaccine hung in the balance on Thursday after a government advisory committee said it needed more time and evidence to determine whether unusual, but severe, blood clots seen in a handful of people were caused by the vaccine.

So far, only six clotting cases have been officially reported out of more than 7 million shots given of the one-dose...

The Biden Administration sought to reassure Americans on Tuesday that the pausing of Johnson & Johnson's coronavirus vaccine is science at work, and not evidence that COVID-19 vaccines are unsafe.

The pause was first issued Tuesday morning following reports that rare but serious blood clots had developed in six women after they took J&J's vaccine. The Advisory Committee on Immunizati...

Extremely rare but life-threatening blood clots linked to the Johnson & Johnson COVID-19 vaccine appear similar to those caused by the AstraZeneca vaccine approved for use in Europe and Canada, U.S. health officials said Tuesday.

Federal officials called for a "pause" in use of the one-dose J&J vaccine while they review data linked to six women between 18 and 48 years of age who developed...

Doctors might have figured out why AstraZeneca's COVID-19 vaccine may cause life-threatening blood clots in very rare cases.

The discovery, made in a pair of reports published online Friday in theNew England Journal of Medicine, could be key to the global rollout of the AstraZeneca vaccine, helping develop effective treatments for the side effect and providing clues on how t...

Time is never more precious than in the minutes after a stroke. Now, research is confirming that a "mobile stroke unit" can rush aid to patients quickly, potentially saving lives.

"Patients who are treated early benefit from a complete reversal of stroke symptoms and avoidance of disability," said lead study author Dr. James Grotta. He is director of stroke research at the Clinical Instit...

For someone suffering a severe stroke, every 10 minutes that goes by before treatment starts in the emergency room may cost eight weeks of a healthy life, Canadian researchers report.

In fact, delays in the hospital may have worse consequences for recovery than delays in getting to the hospital, they noted.

"Our study confirmed that any delay in delivering appropriate stroke treatme...

It's already being taken by millions to help ward off heart issues, and now preliminary research hints that daily low-dose aspirin might also cut your odds of contracting COVID-19.

As the Israeli research team noted, aspirin is an anti-inflammatory and previous studies have shown that it may help the immune system combat some viral infections. According to the researchers, aspirin was wid...

While strokes strike many Americans, a new study shows the risk is particularly high among American Indians.

Researchers already knew that American Indians had the highest risk of atrial fibrillation, which is an irregular heartbeat ("arrhythmia") that can increase the risk of blood clots and stroke.

The new study found that American Indians had a 47% higher risk of having a non-ble...

Giving blood thinners to COVID-19 patients soon after they're hospitalized could reduce their risk of dying.

That's the conclusion of a new study that analyzed data from the U.S. Department of Veterans Affairs on nearly 4,300 patients, average age 68, who were hospitalized with COVID between March 1 and July 31.

Of those, more than 84% received blood thinners within 24 hours of admi...

Full doses of blood thinners can benefit patients hospitalized with COVID-19, but the severity of their illness matters, researchers say.

The new global analysis found that hospitalized patients with moderate COVID-19 may benefit from the drugs' clot-preventing powers, but patients with illness so severe it requires admission to an intensive care unit may not.

"SARS-CoV-2 infectio...

Women who have COVID-19 during childbirth are more likely to face complications than moms-to-be without the coronavirus, researchers say.

Fortunately, the absolute risk for complications for any one woman is very low (less than 1%). But the relative risks for problems -- such as clotting and early labor -- are significant, the new study found.

Still, "the findings here, truly, are t...

Most transgender women can safely continue their estrogen treatments during gender-affirming surgery, a new study finds.

Estrogen therapy and surgery can increase the risk of blood clots, so experts have suggested that transgender women stop taking the hormone when having gender-affirming surgery.

But the sudden loss of estrogen was sometimes very uncomfortable, causing symptoms sim...

Because COVID-19 is known to raise the odds for dangerous blood clots, blood thinners have quickly become part of routine care for many hospitalized patients.

But three clinical trials testing full doses of these drugs in COVID-19 patients have now paused recruitment of critically ill patients because the medications could end up doing more harm than good.

According to experts at th...

Although heart problems are rare complications of pregnancy, Black women face a heightened risk -- even if they have comfortable incomes and health insurance, a new study finds.

It's well established that the United States has a higher maternal mortality rate than other wealthy nations, and Black women are at greater risk than white women.

Less has been known about whether Black wom...

A stronger immune system and healthier blood vessels are among reasons kids are less likely than adults to have severe COVID-19, according to experts who reviewed research from around the world.

"Most children with COVID-19 have no or only mild symptoms, most commonly fever, cough, sore throat and changes in sense of smell or taste. Even children with the usual risk factors for severe inf...

Black Americans face a heightened risk of stroke, and a new study suggests that abnormalities in the heart's upper chambers play a role.

Experts said the findings, published Nov. 25 in the journal Neurology, point to an under-recognized factor in Black Americans' stroke risk.

It has long been known that in the United States, Black adults are particularly hard-hit by ischemi...

Treating COVID-19 patients with high doses of blood thinners doesn't appear to help them and could be harmful, researchers report.

"COVID-19 patients appear to have an increased incidence of blood clots. Many hospitals and health care providers began to use high doses of blood thinners to prevent these clots or treat them preemptively," explained study co-author Dr. Juan Reyes, director o...

Asian COVID-19 patients in the United Kingdom have a higher stroke risk than other racial/ethnic groups, a new study finds.

Researchers analyzed data on 1,470 stroke patients admitted to 13 hospitals in England and Scotland between March and July 2020, during the first wave of the coronavirus pandemic.

Among patients who had an ischemic stroke (one caused by blocked blood flow to th...

After administering clot-busting drugs to treat a stroke, using blood pressure cuffs to squeeze each arm might aid recovery, a new, small Chinese study suggests.

In the technique -- called remote ischemic post-conditioning -- the flow of oxygen-rich blood is repeatedly interrupted and restored using blood pressure cuffs on the arms. Earlier studies have found that the technique may p...

Hospitalized COVID-19 patients face an increased risk of developing dangerous blood clots, a new review indicates.

The odds of a clot are highest for the most critically ill patients. Analysis of 66 studies found that 23% of COVID-19 patients in an intensive care unit (ICU) developed a blood clot in the leg, known as a deep vein thrombosis (DVT).

Overall prevalence of ...

Children who need to take oral steroids for chronic or life-threatening conditions can experience serious side effects, according to new research.

Children with autoimmune disorders such as juvenile arthritis, psoriasis or inflammatory bowel disease are often prescribed a steroid to keep the illness under control.

But the odds that a child might develop diabetes was nearly s...

Most people now know that COVID-19 can cause blood clots, potentially leading to paralysis, stroke, heart attack and death.

While it's not clear precisely how SARS-CoV-2 causes clots, a new study suggests that the amount of a particular protein -- called factor V -- in a patient's blood may have something to do with it.

In March, researchers at Massachusetts General Hospit...

Most strokes strike when an artery in the brain suddenly becomes blocked, but new research shows a rarer cause of strokes is becoming more common.

It's called cerebral venous thrombosis (CVT), and it happens when a vein in the brain is clogged. While CVT is estimated to cause less than 1% of all strokes, scientists discovered it is now more prevalent and affecting a different demo...

COVID-19 is linked to potentially fatal blood clots. Researchers now believe they've found out how they occur, which potentially could lead to better treatment.

"While many forms of illness can generate blood clots, the endothelial cells that line the inside of blood vessels play a surprisingly large role in COVID-19 clotting," said researcher Dr. Alfred Lee, an associate professor o...

A mainstay of 18th-century medicine -- the lowly leech -- has made something of a comeback in the 21st century. That's largely due to powerful blood thinners the parasitic worm secretes naturally.

Now, genetic research could give a major boost to the medical use of leeches, scientists say.

An international team sequenced the genome of a European leech called Hirudo medici...

Stroke patients in rural areas of the United States are less likely to get cutting-edge treatments and more likely to die than those in cities.

That's the takeaway from a new analysis of nationwide data on more than 790,000 adults who were hospitalized with stroke between 2012 and 2017. Most were 64 or older.

Compared to patients in cities, those treated at rural hospitals w...

In a small French study, three-quarters of all COVID-19 patients admitted to intensive care went on to experience a dangerous blood clot in the leg that can travel to the lungs and potentially cause death.

Known as a DVT, the condition first gained notoriety as so-called "economy class syndrome," when passengers on long-haul flights developed them after sitting still for too long. Bu...

New research reveals that COVID-19 attacks the lungs in a far different manner from the flu.

Unlike most respiratory diseases, significant impacts on blood vessels were seen in the lungs of seven COVID-19 patients. The lung tissue of those patients was compared to lung tissue from seven people who died of pneumonia caused by the flu.

There was evidence that COVID-19 attacks ...

Obesity makes COVID-19 worse and may lead to deadly blood clots in the lungs, a new study finds.

The researchers said that obese patients with COVID-19 may have nearly three times the risk of developing what is known as a pulmonary embolism.

"Clinicians can utilize our findings to aid in determining which patients should have evaluation for pulmonary embolism with pulmonar...

A new study offers reassurance that many surgery patients can safely be freed from one discomfort of recovery -- wearing compression stockings to prevent blood clots.

The garments, which help keep blood from pooling in the lower legs, have long been used post-surgery. One reason has been to thwart blood clots, which can form in the leg veins when a patient is laid up in recovery.

...

The new coronavirus isn't just attacking the lungs: New research shows it's causing harm to the gastrointestinal tract, especially in more advanced cases of COVID-19.

A variety of imaging scans performed on hospitalized COVID-19 patients showed bowel abnormalities, according to a study published online May 11 in Radiology. Many of the effects were severe and linked with clots a...

As more evidence emerges that COVID-19 is tied to an increased risk of dangerous blood clots, new research suggests that giving patients blood thinners may improve their odds of survival.

"Using anticoagulants should be considered when patients get admitted to the ER and have tested positive for COVID-19, to possibly improve outcomes," study senior author Dr. Valentin Fuster, physicia...

Stress placed on the heart by COVID-19, a hesitancy by people to call 911, and even reluctance on the part of bystanders to perform CPR may be boosting rates of out-of-hospital cardiac arrest, a new report finds.

The data comes from four provinces in northern Italy, a region that was hit very hard and very early by the coronavirus pandemic.

The researchers said that between ...

COVID-19 might raise stroke risk in young and middle-aged adults, with virus-linked blood clots causing severe damage to their brains, doctors warn.

Word has already spread that the novel coronavirus appears to increase clotting in some patients, experts say.

Now, a series of five cases at the Mount Sinai Health System in New York City indicate that those clots might cause s...

The COVID-19 coronavirus appears to promote blood clotting throughout the body, which might help explain why the germ is so much more deadly than other members of its viral family, experts say.

Some people severely ill with COVID-19 develop blood clots in their lungs and other major organs, doctors have observed.

Doctors suspect these small blood clots are one reason why COV...