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NUR 405 ( LATEST 2024 / 2025 ) EXAM 5 | WITH 100% VERIFIED ANSWERS
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NUR 405 ( LATEST 2024 / 2025 ) EXAM 5 | WITH 100% VERIFIED ANSWERS
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NUR 405 Exam 51. What are disorders of the formation or conduction (or both) of the electrical impulse within
the heart?
Answer
dysrhythmias
2. Dysrhythmia treatment is based on the and
of symptoms produced.
Answer
frequency, severity
3. The electrical impulse that simulates and paces the cardiac muscle normally originates in the
.
Answer
sinus node
4. The electrical stimulation is called and the
mechan- ical contraction is called .
Answer
depolarization, systole
5. Electrical relaxation is called and the mechanical
relaxation is called .
,Answer
repolarizaiton, diastole
6. The heart rate is influenced by the nervous
system.-
Answer
autonomic
7. stimulation increases heart rate and blood pres- sure.
Answer
sympathetic
8. stimulation reduces heart rate and blood pressure.-
Answer
parasympathetic
9. Before applying electrodes, clean the skin with dry gauze and avoid using
because this increases the skin's electrical impedance and hinders
detection of the cardiac electrical signal.
Answer
alchohol
,10. What are distorted, irrelevant, and extraneous ECG waveforms?
Answer
artifact
11. A patient may undergo an study in which electrodes
are placed inside the heart in order to obtain an intracardiac ECG.
Answer
electrophysiology (EP)
12. A standard 12-lead ECG reflects the electrical activity primarily in the
and gives you 12 views of the heart.
Answer
left ventricle
13. When an ECG waveform moves toward the top of the paper, it is called a
.
Answer
positive deflection
14. When an ECG waveform moves toward the bottom of the paper, it is called a .
Answer
negative deflection
, 15. The represents the electrical impulse starting in the SA
node and spreading through the atria.
Answer
P wave
16. The represents ventricular depolarization.
Answer
QRS complex
17. The represents ventricular repolarizaiton.
Answer
T wave
18. The is thought to represent repolarization of Purkin- je
fibers; although this wave is rare it sometimes appears with hypokalemia.
Answer
U wave
19. The is measured from the beginning of the P wave to the
beginning of the QRS complex and represents the time needed for sinus
node stimulation, atrial depolarization, and conduction through the AV node before ventricular
depolarization.
Answer
PR interval
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