Ключевые слова: abstract, beat, cardiogram, cardiology, care, chart, computer, curve, diagnosis, disease, display, electrical, electronic, emergency, energy, frequency, graph, graphic, health, health care, heart rate, heartbeat, hospital, illustration, irregular, life, line, listening, medicals, medicine, modern, monitor, normal, pulse, rate, screen, signal, sound, symbol, technology, test, wave,