NURS142: Final Exam
1.What causes si-
nus bradycar-
dia?# Vagal stimulation (vomiting; straining for BM
# MI # Hypoxia # Digitalis to xicity # Athletes
2.What treatment is available for sinus bradycar-
dia?# None unless the pt is symptomatic
# Atropine # Electronic pacemak er # Epinephr ine and dopamine # Oxygen
3.What causes si-
nus tachycardia?# Atropine or bronchodilators # Emotional upset # Pulmonar y embolus # MI # Congestiv e heart failure # Fever # Inhibition of v agus nerve # Hypoxia # Thyrotoxicosis (th yroid storm)
4.What is the treat-
ment for sinus tachycardia?# Treat the cause # Persistent sin us tachycardia ’ beta b lockers to slow HR # Oxygen NURS142: Final Exam
5.What are wander-
ing atrial pace-
maker (WAP) and multifocal atri-
al tachycardia (MAT) rhythms?# Occur when the pacemaking impulses or iginate from at least three diff erent foci in the atr ia # Each produces its o wn unique P w ave, resulting in a. rhythm with at least three diff erent shapes of P w aves
WAP and MA T are exactly the same rh ythms, just with differing heart rates.
6.What is the rate of WAP?# Mean rate < 100 (50-60s)
7.What is the rate of MAT?# Mean rate > 100
8.What is the cause of WAP?# Medication side eff ects
# Hypoxia # Vagal stimulaiton # MI
9.What is the cause of MAT?# COPD
# Heart disease
10.What treatment is available for MAT?# Beta blockers or calcium channel b lockers if signs of decreased cardiac output e xist
11.Characteristics of premature atrial comple xes (PACs)# Rate: any rate # Regular ity: regular b ut interrupted by the PACs
# Premature P w aves may be hidden in the T wave of the preceding beat ’ def orms the T wave
’ If the PACs P wave is inverted, the PR interval should be the normal 0.12-0.20 secs
# Intervals: QRS <0.12; will be absent after a non conducted PAC
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