Ключевые слова: aid, background, beat, black, blood, cardiologist, cardiology, care, check, dark, diagnosis, different, disease, doctor, emergency, examination, first, flat, health, heart, heartbeat, illness, items, kit, lay, listening, many, mask, measuring, medical, medicine, medicines, object, pattern, pills, pressure, prevention, protective, pulse, rhythm, service, set, sickness, sphygmomanometer, stethoscope, syringe, tool, top, treatment, view,