Ключевые слова: analysis, background, banner, business, cardio, cardiogram, cardiology, care, chart, clinic, closeup, concept, data, diagnosis, diagram, disease, doctor, document, ecg, electrocardiogram, equipment, frequency, graph, graphics, health, healthy, heart, heartbeat, hospital, life, line, medicine, no one, nobody, paper, pen, pulse, research, result, rhythm, science, sheet, stethoscope, technology, test, treatment, white, workplace, world heart day,