In-depth

Causes

Pulmonary embolism

Pulmonary embolism occurs when one or more arteries in your lungs become blocked. Surgery, cancer, family history and long airplane trips may place you at risk.

Complications

Deep vein thrombosis

Deep vein thrombosis occurs when a blood clot forms in veins deep in your body. Recognize the symptoms of this potentially dangerous condition.

Symptoms

Edema

Edema — swelling caused by excess fluid in tissues — can affect any part of your body. Treating the underlying cause is key to resolving edema.

Shortness of breath

Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Tests and diagnosis

Genetic testing

Genetic testing is used to detect altered genes that may cause illness or disease. Although genetic testing can offer important health information, it has limitations.

Sep. 06, 2012