Blood clots1 include deep vein thrombosis (DVT) and pulmonary embolism (PE), which are serious, but preventable medical conditions. DVT is a blood clot in a deep vein, usually in the lower leg, thigh, or pelvis, but it can occur in other places, like the arm. If a DVT breaks off and travels through the bloodstream to the lungs, it causes a PE, which is a blockage of arteries in the lungs. Together, DVT and PE are known as venous thromboembolism (VTE). It is important to know about VTE because it can happen to anybody and can cause serious illness, disability, and even death. Many VTE events are preventable and if found early, can be treated. Jay Harold’s Post, “7 Risk Factors & Symptoms for Blood Clots,” addresses this disease that kills an estimated 60,000-100,0002 Americans yearly of DVT/PE (also called venous thromboembolism).
The most serious complication of DVT happens when a part of the clot breaks off and travels through the bloodstream to the lungs, causing a blockage called pulmonary embolism (PE). If the clot is small, and with appropriate treatment, people can recover from PE. However, there could be some damage to the lungs. If the clot is large, it can stop blood from reaching the lungs and is fatal.
In addition, nearly one-third of people who have a DVT will have long-term complications caused by the damage the clot does to the valves in the vein called post-thrombotic syndrome (PTS). People with PTS have symptoms such as swelling, pain, discoloration, and in severe cases, scaling or ulcers in the affected part of the body. In some cases, the symptoms can be so severe that a person becomes disabled.
For some people, DVT and PE can become a chronic illness; about 30% of people who have had a DVT or PE are at risk for another episode.
7 Risk Factors for DVT
Almost anyone can have a DVT. However, certain factors can increase the chance of having this condition. The chance increases even more for someone who has more than one of these factors at the same time.
Following is a list of factors that increase the risk of developing DVT:
Injury to a vein, often caused by:
Fractures,
Severe muscle injury, or
Major surgery (particularly involving the abdomen, pelvis, hip, or legs).
Slow blood flow, often caused by:
Confinement to bed
(e.g., due to a medical condition or after surgery);
Limited movement (e.g., a cast on a leg to help heal an injured bone);
Sitting for a long time, especially with crossed legs; or
Paralysis.
Increased estrogen, often caused by:
Birth control pills
Hormone replacement therapy, sometimes used after menopause
Pregnancy, for up to 6 weeks after giving birth
Certain chronic medical illnesses, such as:
Heart disease
Lung disease
Cancer and its treatment
Inflammatory bowel disease (Crohn’s disease or ulcerative colitis)
Other factors that increase the risk of DVT include:
Previous DVT or PE
A family history of DVT or PE
Age (risk increases as age increases)
Obesity
A catheter located in a central vein
Inherited clotting disorders
Preventing DVT
The following tips can help prevent DVT:
Move around as soon as possible after having been confined to bed, such as after surgery, illness, or injury.
If you’re at risk for DVT, talk to your doctor about:
Graduated compression stockings (sometimes called “medical compression stockings”)
Medication (anticoagulants) to prevent DVT.
When sitting for long periods of time, such as when traveling for more than four hours:
Get up and walk around every 2 to 3 hours.
Exercise your legs while you’re sitting by:
Raising and lowering your heels while keeping your toes on the floor
Raising and lowering your toes while keeping your heels on the floor
Tightening and releasing your leg muscles
Wear loose-fitting clothes.
You can reduce your risk by maintaining a healthy weight, avoiding a sedentary lifestyle, and following your doctor’s recommendations based on your individual risk factors.
Symptoms/Signs of DVT/PE
Everybody should know the signs and symptoms of DVT/PE, their risk for DVT/PE, to talk to their healthcare provider about their risk, and to seek care immediately if they have any sign or symptom of DVT/PE.
About half of people with DVT have no symptoms at all. The following are the most common symptoms of DVT that occur in the affected part of the body:
Swelling
Pain
Tenderness
Redness of the skin
If you have any of these symptoms, you should see your doctor as soon as possible.
PE
You can have a PE without any symptoms of a DVT.
Signs and symptoms of PE can include:
Difficulty breathing
Faster than normal or irregular heartbeat
Chest pain or discomfort, which usually worsens with a deep breath or coughing
Coughing up blood
Very low blood pressure, lightheadedness, or fainting
If you have any of these symptoms, you should seek medical help immediately.
Treatments for DVT and PE
DVT
Medication is used to prevent and treat DVT. Compression stockings (also called graduated compression stockings) are sometimes recommended to prevent DVT and relieve pain and swelling. These might need to be worn for 2 years or more after having DVT. In severe cases, the clot might need to be removed surgically.
PE
Immediate medical attention is necessary to treat PE. In cases of severe, life-threatening PE, there are medicines called thrombolytics that can dissolve the clot. Other medicines, called anticoagulants, may be prescribed to prevent more clots from forming. Some people may need to be on medication long-term to prevent future blood clots.
DVT does not cause a heart attack or stroke. There are two main types of blood clots.
How a clot affects the body depends on the type and location of the clot:
A blood clot in a deep vein of the leg, pelvis, and sometimes arm, is called deep vein thrombosis (DVT). This type of blood clot does not cause heart attack or stroke.
A blood clot in an artery, usually in the heart or brain, is called arterial thrombosis. This type of blood clot can cause heart attack or stroke.
Both types of clots can cause serious health problems, but the causes and steps you can take to protect yourself are different. To learn more about arterial thrombosis, visit CDC’s information aboutheart disease and stroke prevention.
Prevention Tips
Move around as soon as possible after having been confined to a bed, such as after surgery, illness, or injury.
If you are at risk for blood clots, talk with your doctor about specific ways you can prevent them from occurring. Compression devices (like compression stockings) and medication (anticoagulants) are two ways to prevent DVT.
When sitting for long periods of time, such as when traveling for more than four hours, get up and walk around every 2 to 3 hours, exercise your legs while you are sitting, and wear loose-fitting clothes.
You can reduce your risk for blood clots by maintaining a healthy weight and avoiding a sedentary lifestyle. In other words, exercise improves blood flow, so don’t be a couch potato.
It’s especially important to know your risk for blood clots and follow your doctor’s recommendations based on your individual risk factors.
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