Ключевые слова: arrhythmia, background, cardiac, cardiogram, care, concept, curve, cycle, disease, doctor, ecg, electrocardiogram, graph, graphic, graphical, health, healthy, heart, heart attack, hospital, hypertension, illness, injection, instrument, love, measurement, measurement tool, medical, medicine, needle, paper, pulse, pulse line, record, red, science, symbol, syringe, valentine,