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.
Embolism is a clinical condition where a small particle from a blood clot, fat, air, amniotic fluid, or placental tissue from a different site comes and blocks an artery. In patients who are bed-ridden or immobilized, blood clots may form in the deep veins of legs. This is called deep vein thrombosis.