Ключевые слова: abstract, analysis, background, beat, blue, cardiac, cardiogram, cardiograph, cardiology, care, chart, computer, curve, design, diagnosis, disease, electrical, emergency, energy, equipment, frequency, glow, graph, graphic, health, health care, heart rate, heartbeat, hospital, illustration, life, light, line, medicals, medicine, monitor, neon, pattern, pulse, rate, rythm, science, screen, sinus, symbol, technology, test, wave,