what is a lung clot
Introduction. A pulmonary embolism is a blockage in the pulmonary artery, the blood vessel that carries blood from the heart to the lungs. This blockage â usually a blood clot â is potentially life-threatening because it can prevent blood from reaching your lungs. pulmonary embolism is a blockage in the pulmonary artery, the blood vessel that carries blood from the heart to the lungs. This blockage â usually a blood clot â is potentially life-threatening because it can prevent blood from reaching your lungs.