NREMT AEMT Questions & Answers(graded A)

NREMT AEMT Questions & Answer You are on the scene w/ a 28-year-old female patient complaining of chest pain. A 12-lead shows normal sinus rhythm with a pulse of 88 bpm. What structure of the cardiac conduction system is responsible for this rhythm and rate? - ANSWER SA Node *"Primary pacemaker"- intrinsic rate of 60-100bpm. In the human heart, the right ventricle pumps what? - ANSWER Deoxygenated blood to pulmonary circulation Why must you question a patient about ED drug use prior to administration of nitroglycerin? - ANSWER Administration of nitroglycerin can cause dangerous hypotension if there has been recent ED drug use. *Both drugs are vasodilators. An action potential begins in a myocardial cell when __ enters the cell, giving it a __ charge. - ANSWER sodium, positive What heart rhythm often leads to ventricular fibrillation? - ANSWER Ventricular tachycardia You are responding to an unresponsive child at a school playground. You arrive to find a 10-year-old male unresponsive, pulseless, and apneic. Teachers on scene say the child was hit with a softball in his chest and fell to the ground. What is the most likely cause for the patient's sudden cardiac arrest? - ANSWER Commotio Cordis s(graded A)