Pulmonary Embolism

Pulmonary embolism is the sudden blockage of central or peripheral arteries of the lungs, usually by a blood clot. Pulmonary embolism usually arises from deep vein thrombosis of the lower extremities. In most cases, the clots are small and are not deadly, but they can damage the lung. But if the clot is large and stops blood flow to the lung can cause collapse and death.
T he standard diagnostic approach of patients with clinically suspected acute pulmonary embolism (PE) relies on sequential diagnostic tests, such as clinical probability assessment, plasma D-dimer measurement, compression ultrasonography, computed tomography pulmonary angiography (CTPA), or ventilation-perfusion (V/Q) scan. jama
Scintigraphy can be considered the preferred