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.
Knowledge center. An embolism in a medical context refers to any large moving mass or defect in the blood stream. An air embolism is an air bubble trapped in a blood vessel. When an air bubble travels along an artery, it moves through a system of blood vessels that gradually become narrower.