1. A reentry circuit must have:
A. A circuit with at least two different pathways
B. Pathways with different intrinsic properties of conduction
C. One pathway that conducts slower than the other
D. All of the above
2. In 10% to 35% of patients, the approach to the AV node is split into two tracts: the _____ tract and the _____ tract.
3. Under normal circumstances, the supraventricular impulse will travel down both tracts simultaneously. But, since conduction times are different, conduction through the ____ tract will be quicker.
4. When a PAC hits the two pathways, the fast tract may be refractory. The impulse may then have to travel abnormally down the slow tract. The impulse will then travel retrogradely back up the fast tract to complete the loop. True or False.
5. An indirect sign of a dual pathway system is when the patient has two different __________ but morphologically identical P waves in a normal sinus rhythm.
6. AVNRT is an example of the type of rhythm covered under the broader term paroxysmal supraventricular tachycardias. True or False.
7. The ventricular rates in AVNRT can be anywhere between:
A. 120 and 160 BPM
B. 140 and 180 BPM
C. 150 and 250 BPM
D. 170 and 250 BPM
8. The P waves in AVNRT can be found _________, ___________, or _________ the QRS complex.
9. In AVNRT, the retrograde P waves can cause “pseudo” waves in various leads: pseudo-R’ waves in lead II and pseudo S waves in lead V1. True or False.
10. In addition to the typical form of AVNRT, there is an atypical form of AVNRT. The atypical form is associated with P waves that are inverted and far behind the QRS complex. In other words, the RP interval is prolonged. True or False.