NREMT AEMT

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? - Correct Answer-SA Node *"Primary pacemaker"- intrinsic rate of 60-100bpm. In the human heart, the right ventricle pumps what? - Correct Answer-Deoxygenated blood to pulmonary circulation Why must you question a patient about ED drug use prior to administration of nitroglycerin? - Correct 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. - Correct Answer-sodium, positive What heart rhythm often leads to ventricular fibrillation? - Correct 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? - Correct Answer-Commotio Cordis *Direct blow to the chest during the heart's repolarization period causes the patient to go into v-fib. Early defibrillation is best treatment. When performing chest compressions, what should you allow time for between each compression? - Correct Answer-Recoil You are called to an unknown "patient down" at a private residence. As you get inside and into the back bedroom, you can see that there is a woman face down and motionless. She does not appear to be conscious and there is a pool of saliva next to her head. You and your partner maintain spinal precautions as you get her onto her back. The husband states that she has a history of heart problems, takes a lot of medications, and has no allergies. What would you do next? - Correct Answer-Verify the absence of a carotid pulse and begin CPR. *C-A-B. Pulse, then CPR.