The radar chart is a chart and/or plot that consists of a sequence of equi-angular spokes, called radii, with each spoke representing one of the variables.
Pulmonary embolus: A blood clot or foreign material that has been carried through the blood into the pulmonary artery or one of its branches, plugging the vessel.
Major Causes. Pulmonary embolism (PE) usually begins as a blood clot in a deep vein of the leg. This condition is called deep vein thrombosis. The clot can break free, travel through the bloodstream to the lungs, and block an artery. The animation below shows how a blood clot from a deep vein in the leg can travel to the lungs, causing pulmonary embolism. Click the start button to play the animation.