Which of the following best describes an accelerated idioventricular rhythm (AIVR)?

Which of the following best describes an accelerated idioventricular rhythm (AIVR)?
 
  a. Rapid, chaotic rhythm with no pattern or regularity
  b. Gradual alteration in the amplitude and direction of the QRS; atrial rate indiscernible, ventricular rate 150 to 250 beats/min
  c. Regular ventricular rhythm with QRS complexes measuring 0.10 seconds or less; P waves may occur before, during or after the QRS; ventricular rate 41 to 60 beats/min
  d. Essentially regular ventricular rhythm with QRS complexes measuring 0.12 seconds or greater; atrial rate not discernible; ventricular rate 41 to 100 beats/min

Question 2

Poor R-wave progression is a phrase used to describe R waves that decrease in size from V1 to V4 . This is often seen in an _____ infarction.
 
  a. anteroseptal
  b. anterolateral
  c. inferolateral
  d. inferoposterior

Question 3

Thin strands of fibrous connective tissue extend from the atrioventricular (AV) valves to the papillary muscles and prevent the AV valves from bulging back into the atria during ventricular systole. These strands are called _____.
 
  a. cardiac cilia
  b. Purkinje fibers
  c. papillary muscles
  d. chordae tendineae

Question 4

What does the QRS complex represent?
 
  a. Atrial depolarization
  b. Ventricular contraction
  c. Ventricular repolarization
  d. Ventricular depolarization

Question 5

How would you differentiate a junctional escape rhythm at 40 beats/min from a ventricular escape rhythm at the same rate?
 
  a. It is impossible to differentiate a junctional escape rhythm from a ventricular escape rhythm.
  b. The junctional escape rhythm will have a narrow QRS complex; the ventricular escape rhythm will have a wide QRS complex.
  c. The rate (40 beats/min) would indicate a junctional escape rhythm, not a ventricular escape rhythm.
  d. The junctional escape rhythm will have a wide QRS complex; the ventricular escape rhythm will have a narrow QRS complex.