Describe the features of a blood clot in the lungs.?

Pulmonary embolism: Pe, the medical term for a blood clot in the lungs, can present mildly like a cough and feeling winded with exertion or it can present dramatically with collapse and death. Almost everyone has some breathlessness. Occasionally one coughs blood or feels pain with deep breath or cough. Risk factors are usually present but there's no room to list them all here. If suspected, a ct scan is indicated.

Pulmonary embolus: Typically clot that ends up in the lungs from a deep venous thrombosis of the extremities. Most often this is a DVT of the legs. The clot breaks off and travels through the bloodstream through the heart an into the pulmonary arteries. This is in the most extreme case can cause heart failure, respiratory insufficiency and death.

Can be deadly: The size of the clot dictates how dangerous it is. Very very tiny emboli may not have much clinical consequence, unless it happens frequently. A large embolus that blocks large amounts of flow to the lung can cause symptoms including shortness of breath and even cardiac arrest. Unexpected shortness of breath should always be considered an emergency and evaluated by a doctor right away!