Ключевые слова: background, beat, black, blood, cardiologist, cardiology, care, clinic, color, concept, consultation, cure, desk, device, diagnosis, disease, doctor, examination, flat, grey, health, heart, heartbeat, illness, lay, light, medic, medical, medicine, modern, nobody, notebooks, object, patient, pen, pressure, prevention, problem, pulse, rhythm, sickness, stethoscope, tool, top, treatment, view,