Ключевые слова: analysis, attack, background, beat, blood, cardiac, cardiogram, cardiologist, cardiology, care, chart, clinic, closeup, concept, diagnosis, diagnostic, disease, doctor, ecg, ekg, electrocardiogram, examination, graph, graphic, health, healthcare, healthy, heart, heartbeat, help, hospital, illness, infarction, life, line, medical, medicine, monitor, paper, patient, pulse, red, rhythm, science, tachycardia, test, treatment, ventricular,