Embolism

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Embolism
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Shortness of breath, chest pain, cough, hemoptysis, leg pain, swelling
Complications	Pulmonary embolism, stroke, myocardial infarction
Onset	Sudden
Duration	Variable
Types	N/A
Causes	Blood clot, fat, air, amniotic fluid, tumor cells
Risks	Deep vein thrombosis, surgery, trauma, cancer, pregnancy, prolonged immobility
Diagnosis	CT pulmonary angiography, ventilation/perfusion scan, D-dimer
Differential diagnosis	Pneumonia, myocardial infarction, pneumothorax
Prevention	Anticoagulants, compression stockings, early mobilization
Treatment	Anticoagulation, thrombolysis, surgical embolectomy
Medication	N/A
Prognosis	Variable, depends on size and location of embolism
Frequency	Common
Deaths	N/A

An embolism refers to the obstruction of a blood vessel due to a foreign substance or a blood clot that travels through the bloodstream and lodges in a vessel. This blockage can lead to serious complications, such as stroke or lung damage, depending on where the blockage occurs.

Introduction

Embolism is a medical emergency that requires immediate intervention. It can happen in any part of the body's circulatory system, including arteries and veins. The embolus— a detached intravascular solid, liquid, or gaseous mass— travels through the bloodstream until it reaches a vessel too small to allow further passage, leading to blockage.

Types

• There are several types of embolism, including:
• Thromboembolism: This occurs when a thrombus (blood clot) breaks off and travels through the bloodstream.
• Pulmonary embolism: This type of embolism happens when the blockage occurs in the lung's blood vessels.
• Amniotic fluid embolism: This rare and often fatal type of embolism occurs when amniotic fluid or other debris enters the mother's bloodstream, usually during childbirth.
• Fat embolism: This can occur when fat particles, usually from a bone fracture, enter the bloodstream.

Causes

The leading cause of embolism is a condition called deep vein thrombosis (DVT). In DVT, blood clots form in the deep veins of the legs or arms, which can dislodge and travel to the lungs, causing a potentially fatal pulmonary embolism.

Symptoms

Symptoms of embolism vary depending on the affected organ. For example, a pulmonary embolism might present with shortness of breath, chest pain, and coughing, while an embolism in the brain (causing a stroke) could cause sudden severe headache, difficulty speaking, and paralysis or numbness of the face, arm, or leg.

Diagnosis

Embolism is diagnosed through various imaging studies such as ultrasound, computed tomography (CT), magnetic resonance imaging (MRI), and sometimes angiography. Blood tests can also be used to detect certain markers indicating a blood clot.

Treatment

Treatment for embolism usually involves anticoagulants (blood thinners) to prevent further clotting and thrombolytics (clot-dissolving drugs) to dissolve existing clots. In some cases, surgical procedures or interventions like thrombectomy or placement of a vena cava filter may be required.

Prognosis

The prognosis of embolism largely depends on the size and location of the embolus, the extent of organ damage, and how quickly treatment is initiated.

References

<references>

• Tapson VF. Acute pulmonary embolism. N Engl J Med. 2008;358(10):1037-1052.
• Cohen AT, Agnelli G, Anderson FA, et al. Venous thromboembolism (VTE) in Europe. Thromb Haemost. 2007;98(4):756-764.

</references>

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