Ключевые слова: attack, beats, blood, cardiac, cardio, cardiogram, cardiograph, cardiology, care, clinic, consultation, death, diagnose, diagnosis, doctor, duty, ecg, ekg, electrocardiogram, electrocardiograph, electronics, emergency, equipment, er, exam, graphic, health, healthcare, heart, heartbeat, hospital, injured, life, medical, medicine, monitor, monitoring, nurse, pacemaker, patient, physician, pulse, rates, resuscitation, scientific, technology, test, urgent, waveform, waves,