NCCT Practice Test - Labs Part Two

50 Questions | By Jacklynhuss | Updated: Mar 20, 2022 | Attempts: 960

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This is from section V of the big study book.

Questions and Answers

1.

In the positioning of the electrodes, if the electrodes are placed to close together, the amplitude will be ______.
- A.
  
  Small
- B.
  
  Large
- C.
  
  Round
- D.
  
  Square
2.

The large squares on the ECG paper are equal to
- A.
  
  0.10 sec
- B.
  
  0.20 sec
- C.
  
  0.40 sec
- D.
  
  0.09 sec
3.

A "V wave" will _____ be seen in a normal EKG.
- A.
  
  Always
- B.
  
  Sometimes
- C.
  
  Never
- D.
  
  Usually
4.

The _____ switch controls the gain or amplitude on the EKG.
- A.
  
  Major
- B.
  
  Sensitivity
- C.
  
  Red
- D.
  
  Ticker
5.

When preparing for lead placement you should first care for ______.
- A.
  
  Skin preparation
- B.
  
  Application of electrode wires
- C.
  
  Application of electrodes
- D.
  
  Positioning of electrodes
6.

Conversion of a dysrhythmia to a normal rhythm by applying electric shock to the chest is called ___.
- A.
  
  Cardiac scan
- B.
  
  Pacemaker implant
- C.
  
  Defibrillation
- D.
  
  Endarterectomy
7.

Which of the following is not a criteria for skin preparation for lead placement?
- A.
  
  Clean the skin with an alcohol swipe
- B.
  
  Make sure the skin is damp when applying the electrode
- C.
  
  Shave the hair from the skin
- D.
  
  Roughen the skin for better dermis contact
8.

The electrode site should be _____.
- A.
  
  Clean, smooth, and dry
- B.
  
  Hairy
- C.
  
  Have plenty of skin oil present
- D.
  
  Moist
9.

An ECG tracing measures the amount of voltage and the ____ it takes for the voltage to travel throughout the heart.
- A.
  
  Time
- B.
  
  Route
- C.
  
  Waves
- D.
  
  Lines
10.

In the application of electrodes, secure the electrode by rubbing your finger around the _____ area.
- A.
  
  Center
- B.
  
  Gel
- C.
  
  Adhesive
- D.
  
  Peripheral
11.

When there is no variation of R-R intervals it is called ______.
- A.
  
  Irregular with a pattern
- B.
  
  Absolutely regular
- C.
  
  Essentially regular
- D.
  
  Totally irregular
12.

Ventricular depolarization produces an electrical force or vector with 2 components: 1. magnitude or force, and 2. _____.
- A.
  
  Amplitude
- B.
  
  Ground electrode
- C.
  
  Direction or shape
- D.
  
  Polarization
13.

A downward or negative wave of an electrocardiogram following the P wave is the _____.
- A.
  
  R wave
- B.
  
  T wave
- C.
  
  Q wave
- D.
  
  S wave
14.

A premature ventricular contraction (PVC) where the QRS have the same configuration each time they appear is called ______.
- A.
  
  Uniform
- B.
  
  Malignant
- C.
  
  Fused
- D.
  
  Bigeminy
15.

When applying leads, apply the VI lead _______.
- A.
  
  Directly lateral to V4 at the anterior axillary line
- B.
  
  The fourth intercostal space right sternal border
- C.
  
  Lateral to V5 at midaxillary line
- D.
  
  Fifth intercostal space midclavicular line
16.

Which fact is true about the P wave?
- A.
  
  Duration of the P wave is not greater than 0.11 sec
- B.
  
  Height deflection is small, not more than 3mm
- C.
  
  Both A and B
- D.
  
  No correct answer
17.

When PVC's fall on the T wave, occur in pairs, runs of 3 or more, or are multiform in nature, these conditions are called _____.
- A.
  
  Fused
- B.
  
  Multiform
- C.
  
  Life threatening
- D.
  
  Uniform
18.

When a vector travels away from the positive electrode, a _____ deflection results.
- A.
  
  Positive
- B.
  
  Variation
- C.
  
  T wave
- D.
  
  Negative
19.

The combination of sensors or electrodes used for lead #1 is ______.
- A.
  
  Right arm, left leg
- B.
  
  Right arm, right leg
- C.
  
  Left arm, right arm
- D.
  
  Left arm, left leg
20.

Concerning ECG's for irregular rhythms, any method of rate calculation that depends on intervals between complexes is _____.
- A.
  
  Acceptable
- B.
  
  Computed using 1/2 as fast: 300/2 = 150/minute
- C.
  
  Unreliable
- D.
  
  Computed by counting the number of complexes in a span of 30 large boxes
21.

The ______ wave represents atrial depolarization
- A.
  
  S
- B.
  
  P
- C.
  
  R
- D.
  
  U
22.

While the duration of the ST segment is not generally of clinical significance, it is an exceedingly important portion of the ECG because of _____.
- A.
  
  The fact that it follows the QRS complex
- B.
  
  Shifts up or down from the baseline
- C.
  
  Upward deflection from the baseline
- D.
  
  The shift away from the ischemic area
23.

A QRS measurement of less than _____ seconds indicates a supraventricular pacemaker.
- A.
  
  0.13
- B.
  
  0.14
- C.
  
  0.16
- D.
  
  0.12
24.

The area between waves is referred to as _____.
- A.
  
  Back spaces
- B.
  
  Intervals
- C.
  
  Segments
- D.
  
  Cycles
25.

A terminal lethal dysrhythmia, a dying heart, is called _____.
- A.
  
  Agonal
- B.
  
  Asystole
- C.
  
  Agonist
- D.
  
  Agogue