Ключевые слова: attack, background, beat, blue, cardiac, cardiogram, cardiology, care, clinic, digital, ecg, ekg, electrocardiogram, electrocardiograph, electronics, emergency, equipment, er, exam, health, healthcare, healthy, heart, heartbeat, hospital, human, illustration, image, instrument, life, medical, medicine, modern, monitor, monitoring, pacemaker, patient, physician, pulse, rates, resuscitation, scientific, stress, surveillance, technology, test, urgent, wave, waveform, white,