Ключевые слова: abstract, background, beam, beat, black, blue, cardiac, cardiogram, cardiograph, cardiologist, cardiology, chart, curve, death, diagnosis, display, ecg, effort, ekg, electrocardiogram, glow, graph, health, healthy, heart, heartbeat, hope, hospital, illness, illustration, laser, life, light, line, medicine, monitor, neon, power, pulsating, pulse, rhythm, screen, speed, surveillance, symbol, test, vitality, wave,