Ключевые слова: abstract, amplitude, background, beat, blood, cardiac, cardiogram, cardiology, care, chart, computer, curve, diagnosis, display, ecg, ekg, electrical, electrocardiogram, emergency, frequency, graph, graphic, green, health, healthcare, healthy, heart, heartbeat, hospital, illustration, life, line, medical, medicine, monitor, monitoring, motion, oscillate, pattern, pulse, rate, rhythm, science, screen, shape, stress, technology, test, video, wave,