EKG Analysis Exam 3

• Which heart block rhythm has the distinguishing feature of a PR interval that measures greater than 0.20 second and measures the same duration each time? 1° Heart Block (HB)
• Which of the following heart block dysrhythmias is identified by a repetitive prolonging PR interval pattern after each blocked QRS complex? 2° HB Type I
• Which of the following heart block dysrhythmia is identified by missing QRS complexes and a consistent PR interval measurement? 2° HB Type II
• Which of the following heart block dysrhythmias is identified by regular P-P and R-R intervals that are firing at two distinctly different rates? 3° HB
• P-P intervals are ___ with all heart block dysrhythmias. Regular
• QRS complexes that measure 0.12 second or greater with a rate between 20 and 40 beats per minute indicate that the impulses causing ventricular depolarization are coming from the ___. Purkinje fibers
• What is the typical heart rate range for first degree heart block? 60-100 
• Frequent nonconducted QRS complexes are likely to cause signs of ___. Low cardiac output
• Which heart block dysrhythmia has regular P-P and R-R intervals with both having the same rate? 1° HB
• Which heart block dysrhythmia is known as the classical heart block? 2° HB Type II
• Which ventricular dysrhythmia has no P waves?

  • Accelerated Idioventricular
  • Idioventricular
  • Ventricular Tachycardia
  • Ventricular Fibrillation
• Which ventricular dysrhythmia has a heart rate between 40 and 100 beats per minute? Accelerated Idioventricular
• Which ventricular dysrhythmia has a heart rate less than 20 beats per minute? Agonal
• Which ventricular dysrhythmia has a heart rate between 20 and 40 beats per minute? Idioventricular 
• What is unique about ventricular dysrhythmias with regard to the P-P intervals? There are no P waves, so the P-P interval cannot be measured
• QRS complexes that measure 0.12 second or greater with a rate between 20 and 40 beats per minute indicate that the impulses causing ventricular depolarization are coming from the ____. Purkinje fibers (ventricles)
• Ventricular fibrillation is typically described as ___. Chaotic 
• Which of the following dysrhythmias is not considered to be a medical emergency? Occasional PVCs
• Which pacemaker rhythms have a pacing spike immediately before P waves?

  • Atrioventricular Pacemaker
  • Atrial Pacemaker Rhythm
• Which pacemaker rhythms have a pacing spike immediately before QRS complexes?

  • Ventricular Pacemaker
  • Atrioventricular Pacemaker
• Which type of pacing stimulates both ventricles to contract? Atrioventricular Pacemaker
• Which pacemaker complication shows a pacing spike but no waveform immediately following it? Normal sinus rhythm
• Which of the following is not one of the components to be evaluated on pacemaker tracing? QT Interval
• Which of the following pacemaker functions may result in pacemaker competition? Oversensing
• Which pacemaker complication occurs when a pacemaker is functioning normally but the patient’s heart does not depolarize? Loss of capture
• A patient’s pacemaker changes the rate of the heart based upon the patient’s sinus node rate, breathing, and blood pressure. Which of the following is the most likely type of pacemaker? Rate-responsive
• A dual-chamber pacemaker has ____. Electrodes in the right atrium and right ventricle
• If a pacemaker is paced and sensed in the atria and pacing is not initiated when native atrial activity occurs, what would be the correct code? AAIOO
• Pacemaker competition: Rivalry between the intrinsic and electronic pacemakers, which can lead to life-threatening complications
• Pacemaker (Electronic): a device that delivers electrical impulse to cause depolarization (contractions)
• Loss of capture: pacing activity occurs but is not captured by the myocardium
• Undersensing: pacemaker fails to detect any intrinsic electrical activity 
• Malsensing: pacemaker does not recognize the patient’s inherent heart rate
• Malfunctioning: pacemaker fails to send electrical impulse to the heart
• Oversensing: electrical current from muscle movements or other electrical sources are interpreted by the pacemaker as cardiac in origin
• Pacing spike: a thin vertical line that results from the pacemaker stimulation impulse
• Mechanical capture: heart muscle responds to electrical stimulation and depolarizes (contracts)
• 2° Heart Block Type I

  
• 2° Heart Block Type 2

  
• 3° Heart Block