Ключевые слова: america, black, business, cardiology, clinic, collapse, computer, course, currency, death, dollar, economy, electrocardiogram, emergency, empire, end, exchange, faded, falling, finance, graph, health, healthy, heart, heart attack, heart failure, heartbeat, hospital, irreparable, life, line, medicine, money, monitor, negative, note, pulse, rhythm, science, sickness, sign, stethoscope, suddenness, symbol, the united states, unnecessary, wave, wellness,