Ключевые слова: amplitude, background, beat, blue, cardiac, cardiology, care, chart, curve, ecg, ekg, electrical, electrocardiogram, examining, exercise, graph, graphic, graphical, health, healthcare, healthy, heart, heartbeat, hospital, human, life, medical, medicine, monitoring, myocardial, normal, patient, pattern, pulsating, pulse, recording, red, shape, sine, sinus, stress, technical, test, trace, vitality, wave, waveform,