NUR 215 Unit 1 | Nutrition (Acute Pancreatitis General Concepts: Dysrhythmias) Exam Questions & Answers

NUR 215 Unit 1 | Nutrition (Acute Pancreatitis General Concepts: Dysrhythmias) Exam Questions & Answers-What property of heart cells allows them to generate an electrical impulse spontaneously? A. Excitability B. Contractility C. Automaticity D. Conductivity - C. Automaticity The sympathetic nervous system has which effect on the heart? A. Decreases SA node firing B. Slows AV node conduction C. Increases cardiac contractility D. Has no effect on impulse conduction - C. Increases cardiac contractility Which method is not used to calculate heart rate on an ECG? A. Count QRS complexes in 6 seconds and multiply by 10 B. Divide 1500 by the number of large boxes between R-R intervals C. Divide 1500 by the number of small boxes between R-R intervals D. Count QRS complexes in 1 minute - B. Divide 1500 by the number of large boxes between R-R intervals What is the hallmark ECG finding of a first-degree AV block? A. Dropped QRS complex B. Progressive PR interval lengthening C. Prolonged but constant PR interval D. No relationship between P and QRS waves - C. Prolonged but constant PR interval Which dysrhythmia is considered most life-threatening and requires immediate defibrillation? A. Atrial fibrillation B. Sinus bradycardia C. Ventricular tachycardia D. Ventricular fibrillation - D. Ventricular fibrillation What treatment is recommended for pulseless ventricular tachycardia? A. Atropine B. CPR and rapid defibrillation C. Adenosine D. Synchronized cardioversion - B. CPR and rapid defibrillation Which device delivers a shock synchronized with the R wave? A. Pacemaker B. ICD C. Defibrillator D. Synchronized cardioversion - D. Synchronized cardioversion Torsades de Pointes is best treated with: A. Atropine B. Lidocaine C. IV Magnesium D. Beta blockers - C. IV Magnesium The SA node normally fires at a rate of 60-100 bpm. True False - True Ventricular fibrillation may be pulseless or have a weak pulse. True False - False Atropine is a treatment for symptomatic bradycardia. True False - True Defibrillation is used for asystole. True False - False Patients with an ICD should avoid MRI unless device-approved. True False - True