Ключевые слова: background, black, blue, book, cardiac, cardiology, care, clean, device, diagnosis, diagnostic, disease, education, emergency, equipment, exam, examination, green, health, hear, heartbeat, hospital, instrument, isolated, listen, lung, measurement, medical, medicine, metal, notebook, notepad, pen, pile, profession, professional, pulse, research, science, scientific, stack, sterile, stethoscope, study, test, tool, treatment, white, yellow,