1. PJCs are ________ supraventricular complexes with QRS intervals less than _____ seconds.
2. The P waves in PJCs are either buried, absent, or _________ in leads II, III, and aVF.
3. PJCs can be associated with either compensatory or noncompensatory pauses. True or False.
4. PJCs are typically only found in patients with structural or ischemic heart disease. True or False.
5. PJCs are typically associated with:
A. Fixed coupling intervals
B. Variable coupling intervals
C. Both A and B are correct.
D. None of the above
6. PJCs with QRS complexes wider than 0.12 seconds are found in patients with:
A. Preexisting bundle branch block
B. Aberrantly conducted beats
C. Electrolyte abnormalities
D. Fusion complexes
E. All of the above
7. Buried P waves frequently alter the morphology of the previous ___ wave.
8. When deciding between the possibility that a complex is either a PAC or a PJC, the presence of a compensatory pause favors which type of premature complex?
A. PJC
B. PAC
C. Neither
9. If the last few milliseconds of a wide-complex premature beat and the sinus beat are exactly the same, the wide-complex premature beat is probably aberrantly conducted. True or False.
10. Always take a look at the direction of the start of the QRS. If both the wide and narrow complexes are headed in the same direction, it is probably an aberrancy. True or False.