Question 1

The measurement of a wave starts when the wave departs the____________.

Accepted Answer

A)  baseline 
B)  isoelectric line 
C)  vertical axis 
D)  horizontal axis

Question 2

When the heart rhythm or heart rate is consistently or predictably irregular or abnormal, or absent, it is known as a(n)__________ .

Accepted Answer

A)  sinus rhythm 
B)  arrhythmia 
C)  atrial systole 
D)  ventricular systole

Question 3

Which of the following heart rhythms, as shown in the figure below,   must have all the normal rhythm values plus the P wave must be upright and uniform in Lead II and the rhythm must be consistent with very little deviation?

Accepted Answer

A)  Normal sinus 
B)  Regularly irregular 
C)  Occasionally irregular 
D)  Irregularly irregular

Question 4

Which of the following intervals represents the entire ventricular depolarization and repolarization cycle?

Accepted Answer

A)  PRI interval 
B)  Q-T interval 
C)  P-R Interval 
D)  R-R interval

Question 5

Which of the following is defined as a measurable, regularly recurring, impulse of the heart?

Accepted Answer

A)  Heart rate 
B)  Heart beat 
C)  Heart rhythm 
D)  Heart phases

Question 6

The normal T wave is usually what shape in appearance?

Accepted Answer

A)  Symmetrical 
B)  Asymmetrical 
C)  Spiked 
D)  Curved

Question 7

A normal heart rhythm has a heartbeat at regular intervals of how many beats per minute?

Accepted Answer

A)  125-150 
B)  100-125 
C)  60-100 
D)  50-75

Question 8

______________ is the strength or magnitude of the action potential.

Accepted Answer

A)  Duration 
B)  Repolarization 
C)  Amplitude 
D)  Conduction

Question 9

Stress, exercise, general health, previous cardiac events, even sleeping can all alter the heart rate. What type of heart rate does the ECG tracing in the figure below represent?

Accepted Answer

A)  A-Fib 
B)  Bradycardia 
C)  Tachycardia 
D)  Normal heart rate

Question 10

During what segment will the atria and ventricles be relaxed, which means the heart is in a diastolic state?

Accepted Answer

A)  PRI interval 
B)  TP segment 
C)  PR segment 
D)  ST segment

Question 11

Which of the following waves sometimes appears as a result of certain antiarrhythmic drug effects, drug toxicity, or electrolyte imbalances?

Accepted Answer

A)  R wave 
B)  S wave 
C)  U wave 
D)  T wave

Question 12

What wave is thought to represent repolarization of the Purkinje fibers?

Accepted Answer

A)  T 
B)  S 
C)  U 
D)  R

Question 13

Lead reversals can be spotted on an ECG usually by the inversion of ___________waves.

Accepted Answer

A)  P 
B)  QRS 
C)  R 
D)  S

Question 14

What type of heart rhythm deviates from a normal rhythm on a regular basis and usually occurs as a patterned event?

Accepted Answer

A)  Irregularly irregular rhythm 
B)  Occasionally irregular rhythm 
C)  Normal sinus rhythm 
D)  Regularly irregular rhythm

Question 15

Which of the following shows up on an ECG tracing as a curved or spiked line either above or below the isoelectric line?

Accepted Answer

A)  Complex 
B)  Wave 
C)  Interval 
D)  Segment

Question 16

Which of the following movement errors does the ECG tracing below show?

Accepted Answer

A)  Somatic tremor 
B)  Wandering baseline 
C)  Shivering 
D)  Parkinson's disease

Question 17

Which of the following limb lead reversal errors does this ECG tracing represent?

Accepted Answer

A)  Both arms and legs limb leads reversed 
B)  Reversal of left arm and right arm leads 
C)  Reversal of right arm and right leg leads 
D)  Reversal of left arm and right leg leads

Question 18

With an irregularly irregular rhythm there is no R-R pattern or similarity between the P-R interval or QRS complexes. Irregularly irregular rhythms are due to abnormalities found in the atria. What disorder that has an irregularly irregular rhythm is illustrated in the ECG tracing in the figure below?

Accepted Answer

A)  Wandering atrial pacemaker 
B)  Atrial tachycardia 
C)  Atrial fibrillation 
D)  Atrial depolarization

Question 19

The morphology of a normal S wave is a(n) ______________.

Accepted Answer

A)  small, negative, spiked deflection 
B)  asymmetrical appearance 
C)  large, positive, spiked deflection in Lead II 
D)  small curved positive wave in Lead II

Question 20

Which of the following is the amount of electrical stimulus or the difference in action potential created by cardiac cell movement within the heart?

Accepted Answer

A)  Isoelectric 
B)  Voltage 
C)  Current 
D)  Impulse

Exam 7: Waveforms Rate Rhythm and Artifacts