Ключевые слова: activity, analysis, analyze, background, beat, cardiogram, cardiology, care, copy, display, document, ecg, ekg, electrocardiogram, electrocardiograph, frequency, graph, graphic, grid, health, healthy, heart, heartbeat, horizontal, hospital, human, illustration, life, line, medical, medicine, monitor, monochrome, nobody, patient, pressure, print, pulse, rate, space, stethoscope, technology, trace, view, wave, white,