Ключевые слова: background, beat, blue, brain, cardiac, cardiogram, cardiological, cardiology, care, chart, clinic, close, concept, death, ecg, eeg, ekg, electrocardiogram, epilepsy, frequency, graph, graphic, health, healthcare, healthy, heart, heartbeat, hospital, life, line, medical, medicine, nhs, paper, pattern, printout, pulse, science, test, texture, trace, wave,