Ключевые слова: abstract, background, beat, bio, biochemistry, biology, blue, cardiac, care, chart, chemistry, computer, concept, curve, design, diagnosis, disease, display, dna, emergency, frequency, graph, graphic, health, healthcare, healthy, heart, heartbeat, hospital, illustration, laboratory, life, line, medical, medicine, modern, monitor, monitoring, oscilloscope, pattern, pulse, rate, science, screen, signal, structure, symbol, technology, test, wave,