Ключевые слова: abnormal, angina, attack, beta, blocker, blood, cardiac, cardiology, cardiovascular, care, class, clinical, contraindication, diagnosis, disease, drug, dysrhythmias, effect, ekg, failure, heart, high, hypertension, infarction, inscription, manage, management, medication, metoprolol, myocardial, nervous, packing, pathology, pectoralis, pharmacology, pill, pressure, prevention, propranolol, protect, receptor, research, rhythm, scene, second, surgery, sympathetic, system, treatment, vessel,