Portable Life Line Screening. Utilizing versatile gear, organizations like AngioScreen, Life Line Screening, and Matrix Medical Network offer Life Line Screening like EKGs or carotid course filters at public venues, temples, emergency clinics, and working environments. Life Line, the predominant player, markets heaps of tests through advertisements, flyers, and email, and says it screens right around 1 million individuals each year at 16,000 occasions.