Ключевые слова: background, cardiac, cardiogram, cardiologist, cardiology, care, clinic, clinical, closeup, cure, device, diagnosis, diagnostic, disease, doctor, emergency, equipment, exam, examination, frequency, health, healthcare, healthy, hear, heart, heartbeat, hospital, human, illness, instrument, isolated, listening, medic, medical, medicine, metal, pressure, professional, pulse, red, research, rubber, science, shape, sick, stethoscope, test, tool, treatment, white,