Ключевые слова: background, book, cardiac, cardiology, care, closeup, communication, computer, control, device, diagnosis, diagnostic, education, emergency, equipment, exam, examination, health, hear, heartbeat, hospital, instrument, isolated, keyboard, listen, lung, macro, measurement, medical, medicine, metal, modern, multimedia, number, pen, profession, professional, pulse, research, science, scientific, sepia, shiny, silver, stethoscope, test, tint, tool, treatment, vintage, white,