Ключевые слова: background, beat, black, blood, cardiac, cardio, cardiogram, cardiograph, cardiology, care, checkup, curve, design, donor, ecg, ekg, electrocardiogram, flat, frequency, graph, graphic, health, healthy, heart, heartbeat, icon, illustration, isolated, life, line, medical, medicine, monitor, outline, pacemaker, pressure, pulse, rate, red, rhythm, sign, simple, symbol, technology, test, wave, website, white,