Ключевые слова: background, beat, cardiogram, cardiology, care, chart, curve, diagnosis, disease, ecg, ekg, electrocardiogram, frequency, graph, health, health care, healthy, heart, heartbeat, human, illness, image, isolated, life, lifestyle, line, love, medical, medicine, monitor, pattern, pulse, red, science, shape, survival, symbol, test, visual, vitality, wave, waveform,