168. Compared to the permanent pacemaker, does a temp pacer have constant current or voltage? Also, how much voltage can it generate? 5V or 20V? - ANS Constant current, 20V. (Doubles 9.5V)
171. Which patient with acute MI is most likely to need a temp pacer?
Inferior MI, Mobitz I AV Block
...
AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
A+ GRADED
, 168. Compared to the permanent pacemaker, does a temp pacer have constant current or
voltage? Also, how much voltage can it generate? 5V or 20V? - ANS Constant current, 20V.
(Doubles 9.5V)
171. Which patient with acute MI is most likely to need a temp pacer?
Inferior MI, Mobitz I AV Block
Inferior MI, bundle branch block
Anterior MI, Mobitz I AV Block
Anterior MI, bundle branch block - ANS Anterior MI, bundle branch block
Acute BBB post MI should be seen as a warning and often proceeds CHB. The RCA commonly
supplies blood to the AV node making the impact of an Anterior MI more significant
ck
12. For maximum electrical safety, the ECG monitored patient should be _____________, and
the monitor chassis should be _______________ or non-conductive. (Grounded vs
Ungrounded) - ANS Ungrounded, grounded
34. What channel is responsible for the SA and AV node upstroke? - ANS Ca++ Slow
lo
Channel
38. How does gender effect SVT frequency for AVNRT and AVRT? - ANS
likely to get AVNRT, men twice as likely to get AVRT
Women twice as
yc
39. The plateau (phase 2) occurs on the surface ECG during the_________ , and during
mechanical _________________ . - ANS QT interval, Systole
48. The pause after atrial pacing is termed: - ANS Overdrive suppression
ud
49. Most arrhythmias in the EP lab are caused by?
a. Vagal response
b. Automaticity
c. Triggered
d. Reentry - ANS Reentry
St
50. What mechanism causes "triggered" arrhythmias?
a. Reentry
b. After depolarization
c. Automaticity of the atrial tissue
d. Automaticity of the ventricular tissue - ANS After depolarization (think R on T)
51. What do the terms EAD and DAD stand for and what arrhythmias are they associated with?
- ANS EAD - Early afterdepolarization, Torsades
DAD - Delayed after depolarization, RVOT VT
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