EKGs, 9th edition Walraven
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,Basic Arrhythmias With 12-Lead EKGs, 9e (Walraven)
Chapter 1 Electrophysiology
1) The inherent rate of the SA node is ________ bpm.
A) 30-60
B) 40-60
C) 60-100
D) 100-120
Answer: C
Learning Obj.: 1.3
2) The inherent rate of the AV junction is ________ bpm.
A) 20-40
B) 40-60
C) 60-100
D) 100-120
Answer: B
Learning Obj.: 1.3
3) The inherent rate of the ventricle is ________ bpm.
A) 20-40
B) 40-60
C) 60-100
D) 100-120
Answer: A
Learning Obj.: 1.3
4) The built-in rate of each of the three major areas of the conduction system is referred to as the
________ rate.
A) fast
B) heart
C) escape
D) inherent
Answer: D
Learning Obj.: 1.3
5) What term is used to refer to the process of electrical discharge and the flow of electrical
activity?
A) Repolarization
B) Depolarization
C) Polarization
D) Polarized
Answer: B
Learning Obj.: 1.2
1
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, 6) If polarizing is considered the ready state, then ________ would be considered the recovery
state.
A) discharge
B) polarization
C) repolarization
D) depolarization
Answer: C
Learning Obj.: 1.2
7) After leaving the area of the AV node, impulses go through the ________ to reach the right
and left bundle branches.
A) Purkinje fibers
B) Bundle of His
C) AV junction
D) SA node
Answer: B
Learning Obj.: 1.3
8) Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve.
A) vagus
B) coronary
C) aortic
D) pericardial
Answer: A
Learning Obj.: 1.4
9) When stimulated, the ________ branch of the nervous system increases heart rate, AV
conduction, and irritability.
A) parasympathetic
B) sympathetic
C) pacemaker
D) inherent
Answer: B
Learning Obj.: 1.4
10) Which cardiac cells are responsible for initiating and conducting pacemaker impulses?
A) Motor cells
B) Mechanical cells
C) Electrical cells
D) Atrioventricular cells
Answer: C
Learning Obj.: 1.1
2
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