Ключевые слова: abstract, background, beat, blue, cardiac, cardiogram, care, chart, computer, curve, design, diagnosis, disease, display, ecg, ekg, electrical, electronics, emergency, energy, equipment, frequency, graph, graphic, health, heart, heartbeat, hospital, illustration, life, line, listening, love, medical, medicine, modern, monitor, oscillate, oscilloscope, pattern, pulse, rate, rhythm, screen, signal, symbol, technology, test, wave,