NR 546 MIDTERM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED)

NR 546 MIDTERM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) P wave Correct Answer atrial depolarization QRS complex Correct Answer ventricular depolarization T wave Correct Answer ventricular repolarization U wave Correct Answer repolarization of the purkinje fibers may be associated with hypokalemia junctional dysrhythmias 1 Correct Answer SA node fails to fire or impulse is blocked at AV node Abnormal P wave Normal QRS First degree AV block Correct Answer associated with increasing age, disease states, certain drugs PT asymptomatic no treatment needed monitor for rhythm changes Second degree AV block Type 1 (Mobitz 1, Wenckebach) Correct Answer QRS complexes get further apart and eventually drops will see two P waves with no QRS complex may result from drugs, CAD treat if symptomatic - atropine, pacemaker Second degree AV block Type 2 2 Correct Answer One or more QRS complexes are dropped (do not make it through the AV junction) with unchanging PR intervals Irregular Rhythm associated with heart disease, drug toxicity results in decrease cardiac output treat with pacemaker Third degree AV block (complete heart block) Correct Answer Heart rhythm that occurs when the atria and ventricles contract independently because of the inability of any atrial impulses to reach the ventricles associated with severe heart disease, some systemic diseases, certain drugs decreased CO, HF, ischemia treat immediately with pacemaker and drugs to increase HR premature ventricular contraction (PVC) 3 Correct Answer a common cardiac arrhythmia that results in the feeling of skipped or extra beats caused by impulses originating outside the SA node associated with stimulants, electrolyte imbalances, hypoxia, heart disease not harmful to a normal heart ventricular tachycardia Correct Answer a very rapid heartbeat that begins within the ventricles associated with heart disease, electrolyte imbalances, drug toxicity, CNS disorders possibility of developing ventricular fibrillation treat with lidocaine, amiodarone, cardioversion pulseless - initiate CPR and rapid defibrillation