Ключевые слова: aged, anatomy, attack, background, beat, blood, body, cardio, cardiogram, cardiologist, cardiology, cardiovascular, care, check, check up, clinic, concept, diagnosis, doctor, donor, ekg, emergency, hand, health, healthcare, healthy, heart, heartbeat, help, hospital, illness, life, listening, love, medical, medicine, nurse, organ, patient, professional, pulse, rate, red, rhythm, shape, sick, stethoscope, support, symbol, test,