Ключевые слова: aged, attack, background, beat, blood, cardiogram, cardiology, care, chest, clinic, diagnosis, doctor, ecg, ekg, elderly, electrocardiogram, emergency, frequency, health, heart, heartbeat, holding, hospital, illness, life, line, malady, man, medical, medicine, old, pain, patient, pension, people, pulse, red, save, senior, shocked, sickness, sign, signal, stethoscope, suffering, symbol, symptom, treatment, wave,