Paget-Schroetter Syndrome: What It Is and How It Is Treated

Written by Medicover Team and Medically Reviewed by Dr N Srikantiya Indira , Vascular Endovascular Surgeon

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Paget-Schroetter Syndrome, also known as effort thrombosis, is a rare form of deep vein thrombosis that affects the veins of the upper chest, shoulder, and arm. It occurs when a blood clot develops in a deep vein, usually the subclavian or axillary vein.

The condition is often associated with repetitive or strenuous arm movements that compress the vein. Early diagnosis and treatment are important to restore blood flow, relieve symptoms, and reduce the risk of complications such as pulmonary embolism.

What Are the Types of Paget-Schroetter Syndrome?

Paget-Schroetter Syndrome is generally considered a form of effort-induced upper-extremity deep vein thrombosis. The underlying cause may vary depending on whether vein compression, trauma, or another clotting risk factor contributes to the condition.

Understanding the underlying cause can help doctors determine the most appropriate treatment and reduce the risk of recurrent blood clots.

Primary Paget-Schroetter Syndrome: Also known as effort thrombosis, this occurs when repetitive or strenuous arm movements contribute to compression and injury of the subclavian vein, resulting in blood clot formation.
Secondary Upper-Extremity Thrombosis: Similar symptoms may occur because of an underlying anatomical abnormality, medical condition, central venous catheter, or other factors that interfere with venous blood flow.
Trauma-Associated Thrombosis: Injury involving the shoulder, chest, or upper extremity can damage a vein and contribute to clot formation.

What Are the Symptoms of Paget-Schroetter Syndrome?

Paget-Schroetter Syndrome can cause sudden or gradually developing symptoms in the affected arm, shoulder, or hand. These symptoms occur because a blood clot obstructs normal venous blood flow.

Recognizing these symptoms early is important because untreated upper-extremity deep vein thrombosis can lead to complications and persistent swelling or discomfort.

Swelling in the arm, hand, or shoulder
Pain or tenderness in the affected arm, particularly after physical activity
A feeling of heaviness or tightness in the arm
Visible or prominent veins in the affected arm or upper chest
Skin discoloration, such as redness or a bluish tint
Warmth or tenderness over the affected area
Weakness or discomfort in the affected arm

What Are the Causes of Paget-Schroetter Syndrome?

Paget-Schroetter Syndrome usually develops when repetitive or strenuous arm movements cause compression, irritation, or injury to the subclavian vein. This can slow blood flow and promote the formation of a blood clot.

Anatomical abnormalities around the thoracic outlet can increase the likelihood of vein compression, while trauma and certain blood-clotting conditions may further contribute to the risk.

Repetitive or strenuous overhead arm movements
Heavy lifting or activities involving repeated arm exertion
Anatomical abnormalities that compress the subclavian vein
Trauma or injury involving the shoulder, chest, or upper extremity
Underlying hypercoagulable or blood-clotting disorders
Conditions or medical devices that interfere with normal venous blood flow

When to See a Doctor?

Seek medical attention if you develop sudden or unexplained swelling, pain, heaviness, or discoloration in one arm, particularly after strenuous upper-body activity. Early evaluation can help identify an upper-extremity blood clot and prevent serious complications.

A vascular surgeon can evaluate Paget-Schroetter Syndrome. Depending on the findings, a hematologist or interventional radiologist may also be involved in diagnosis and treatment.

Sudden or progressive swelling of one arm or hand
Pain, heaviness, warmth, or tenderness in the affected arm
Prominent veins over the arm, shoulder, or upper chest
Red or bluish discoloration of the affected arm
Symptoms that develop after strenuous or repetitive arm activity

Get medical help immediately if:

Sudden severe arm swelling or intense pain
Rapidly worsening discoloration or swelling
Sudden shortness of breath or difficulty breathing
Chest pain, coughing, or coughing up blood

These symptoms may indicate a serious blood-clot complication such as pulmonary embolism and require urgent medical care.

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How Is Paget-Schroetter Syndrome Diagnosed?

Diagnosis of Paget-Schroetter Syndrome begins with a physical examination and review of symptoms, activity history, and risk factors. The affected arm is assessed for swelling, discoloration, prominent veins, tenderness, and other signs of impaired venous blood flow.

Imaging tests are then used to confirm the presence and location of a blood clot and assess the affected veins. Additional testing may be recommended when an anatomical abnormality or underlying clotting disorder is suspected.

Duplex Ultrasonography: A non-invasive test commonly used to evaluate blood flow and identify a clot in the veins of the arm.
CT or MR Venography: These imaging tests can provide detailed views of the veins and help identify compression or other abnormalities.
Contrast Venography: A specialized X-ray test that uses contrast material to visualize the veins and may be used when more detailed assessment is needed.
Blood Tests: Blood tests may be performed when an underlying clotting disorder or other contributing condition is suspected.

What Are the Treatment Options for Paget-Schroetter Syndrome?

Treatment for Paget-Schroetter Syndrome aims to remove or control the blood clot, restore normal blood flow, relieve symptoms, and prevent recurrent thrombosis. Treatment depends on the duration and severity of the clot, the patient's overall health, and whether vein compression is present.

Some patients require anticoagulation alone, while others with significant or recent thrombosis may need clot-directed treatment followed by a procedure to relieve the underlying venous compression.

Anticoagulant Therapy: Blood-thinning medicines are used to prevent the clot from growing and reduce the risk of additional clots.
Thrombolytic Therapy: In selected patients with recent, extensive thrombosis, medicines may be used to dissolve the blood clot and restore venous blood flow.
Catheter-Based Thrombectomy: A catheter-based procedure may be considered in selected cases to remove a significant clot and improve blood flow.
Thoracic Outlet Decompression: Surgery may be recommended when compression of the subclavian vein is caused by an anatomical abnormality and there is a significant risk of recurrent thrombosis.
Compression and Rehabilitation: Follow-up care, activity modification, and rehabilitation may help manage persistent swelling and support recovery.
Lifestyle Changes: Avoiding activities that trigger excessive arm strain during recovery and following the treatment plan can help reduce the risk of recurrence.

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What Are the Risk Factors of Paget-Schroetter Syndrome?

Certain activities and anatomical factors can increase the risk of developing Paget-Schroetter Syndrome. The condition is particularly associated with repetitive upper-body activity that places stress on the veins around the shoulder and chest.

Identifying these risk factors can help people at increased risk recognize symptoms early and seek timely medical evaluation.

Repetitive overhead arm movements
Strenuous sports or physically demanding activities
Occupations involving frequent heavy lifting or overhead work
Anatomical abnormalities around the thoracic outlet
Previous trauma to the shoulder or upper chest
Inherited or acquired blood-clotting disorders

Frequently Asked Questions

1. What early signs should I look for with Paget-Schroetter Syndrome?

Look for swelling, pain, and discoloration in the affected arm. You may also notice swelling in the neck or shoulder area.

2. Are there specific things I should or shouldn't do when dealing with Paget-Schroetter Syndrome?

Avoid activities that put pressure on the affected arm. Focus on following your doctor's treatment plan, which may include medications and physical therapy.