Ключевые слова: analysis, background, beat, blue, cardiac, cardiogram, cardiologist, cardiology, care, chart, clinic, closeup, color, concept, diagnosis, diagnostic, disease, drug, electrocardiogram, emergency, equipment, graph, health, healthy, heart, heartbeat, hospital, illness, life, love, medical, medicine, note, notebook, office, paper, part, pill, pulse, record, research, science, stethoscope, table, technology, test, wooden, write,