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An Introduction to Deep Vein Thrombosis

Blood cells join together to form clots when the blood moves slowly through the veins. When formed in the legs, these blood clots cause a condition known as ‘Deep Vein Thrombosis (DVT)’. DVT clots are located in the veins embedded deep within the thigh and lower leg muscles, hence the name, and may even to be life-threatening.

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Symptoms:

Most people never experience any distinct Deep Vein Thrombosis -related symptoms. Those who do have symptoms may experience:

  • Swollen legs (usually one but sometimes both)
  • Leg pain originating from the calf that often feels like cramping or soreness
  • Reddish, pale or bluish skin colour, particularly in the lower back leg.
  • Warm patches of skin in the affected leg
  • Severe, unexplained foot and ankle pain
  • Pain or tenderness while walking or standing
  • An unusually firm or thick vein in the lower-back leg.

Causes:

DVT can result from anything that prevents normal blood clotting, with the most common causes being:

1-Slow Flowing Blood:

When blood moves slowly, it cannot mix properly with the naturally occurring anticoagulants. This promotes the formation of blood clots. Lack of motion due to prolonged bed rest and regularly sitting for long periods of time often results in slow blood flow.

2-Easily Clotted Blood:

Blood that clots easily, usually due to an inherited blood clotting disorder, can also contribute towards Deep Vein Thrombosis development in some people.

3-Hypercoagulation:

Blood clots can form when blood thickens around foreign objects like tissue debris or fat in the veins. These foreign substances can sometime be accidently released into the bloodstream during a lower-back surgery.

4-Vein Wall Damage:

Doctors often move aside tendons, ligaments, and muscles to reach the required operating area during a lower-back surgery. This can trigger the release of clot-promoting substances, hence resulting in excess clot formation.

Risk Factors:

A number of health conditions and daily activities can cause Deep Vein Thrombosis; some of which are:

  • Being older than 60
  • A family history of Deep Vein Thrombosis
  • Elevated hormone levels, slow blood flow, and increased blood pressure in the pelvic and leg veins during pregnancy. This risk remains until 6 weeks after delivery. A cesarean delivery and a previous clotting disorder further amplify the risk.
  • High estrogen levels due to birth control pills or hormone replacement therapy in women.
  • Excess leg pressure due to obesity.
  • Smoking
  • Some forms of cancer and chemotherapy
  • Heart failure (a condition that reduces the heart’s blood pumping ability)
  • Inflammatory bowel disease
  • Catheters installed in a vein for heart monitoring

Complications:

If treatment is delayed or if left untreated, Deep Vein Thrombosis can evolve into the following conditions:

1-Pulmonary Embolism (PE):

At times, part of a clot present in the leg can break free and travel to the heart via the bloodstream. This rogue clot often gets stuck in a pulmonary (lung) artery and partially blocks the lung’s air and blood flow with possibly fatal consequences. PE may occur days later or soon after a blood clot forms in the leg and requires urgent medical attention.

Symptoms of PE include sudden shortness of breath, chest pain that worsens with coughing or breathing deeply, rapid pulse rate, dizziness, lightheadedness, and coughing up blood.  Due to lack of initial symptoms, PE is often the first sign of DVT in most people.

2-Post-Thrombotic Syndrome:

A DVT blood clot can sometimes damage the valves (structures that control blood flow in the veins) by raising blood pressure in the veins. Blood starts collecting at the damage site, resulting in chronic, disabling calf pain even after the blood clot is dissolved.

Other signs of post-thrombotic syndrome include edema (permanent swelling throughout the leg), and skin discolouration and sores in the affected part of the leg.

Consult with your doctor for a proper diagnosis if you observe any signs of deep vein thrombosis. Seek immediate medical attention, however, in case of PE symptoms to avoid possibly fatal complications. You can also book an appointment with a top Cardiologist or a top Radiologist in Islamabad, Karachi and Multan through oladoc.com, or call our helpline at 042-3890-0939 for assistance to find the RIGHT Doctor for your vascular concerns.

Disclaimer: The contents of this article are intended to raise awareness about common health issues and should not be viewed as sound medical advice for your specific condition. You should always consult with a licensed medical practitioner prior to following any suggestions outlined in this article or adopting any treatment protocol based on the contents of this article.
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