Basic ECG Interpretation questions
and correct answers
Question 1 of 4 ws ws ws
Match the property of the cardiac conduction system with its description.
ws ws ws ws ws ws ws ws ws ws
Property of the cell that allows it to accept initiation of stimulation
ws ws ws ws ws ws ws ws ws ws ws
-Excitability
Property that moves electrical impulse along a membrane
ws ws ws ws ws ws ws
-Conductivity
Ability of heart muscle to respond mechanically to an impulse
ws ws ws ws ws ws ws ws ws
-Contractility
Ability of heart muscle to initiate an impulse, begin stimulation
ws ws ws ws ws ws ws ws ws
-Automaticity - ans- ws ws
Question 2 of 4 ws ws ws
List in order the pathway of the normal cardiac impulse starting at the SA node.
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
The impulse causes the atria to contract.
ws ws ws ws ws ws ws
The impulse travels from the AV node through the bundle of His.
ws ws ws ws ws ws ws ws ws ws ws ws
The impulse divides into the left and right bundle branches.
ws ws ws ws ws ws ws ws ws ws
The impulse reaches the Purkinje fibers.
ws ws ws ws ws ws
The ventricles contract. - ans-
ws ws ws ws
Question 3 of 4 ws ws ws
An increase in the rate of cardiac impulse initiation is linked to stimulation of which
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
component?
Purkinje system ws
Electrolyte system ws
Sympathetic nervous system ws ws
Parasympathetic nervous system - ans-Sympathetic nervous system
ws ws ws ws ws ws
The sympathetic nervous system is responsible for increasing the rate of cardiac im
ws ws ws ws ws ws ws ws ws ws ws ws
pulse initiation at the SA node. It also assists with node impulse conduction and car
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
diac contractility.
ws
Question 4 of 4 ws ws ws
Which electrolytes play key roles in polarization of the heart cells?
ws ws ws ws ws ws ws ws ws ws
Sodium and potassium
ws ws
Potassium and calcium ws ws
Potassium and glucose ws ws
Sodium and magnesium - ans-Sodium and potassium
ws ws ws ws ws ws
, The electrolytes sodium and potassium are partners in cardiac function. A higher so
ws ws ws ws ws ws ws ws ws ws ws ws
dium level outside the cell allows for a high potassium and low sodium level inside t
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
he cell. Potassium inside the cell is required for the conduction of impulses to achie
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
ve a polarized state.
ws ws ws
Question 1 of 4 ws ws ws
Which wave on the ECG tracing will provide the nurse more information about atrial
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
depolarization?
A
B
C
D - ans-B
ws ws
The P wave demonstrates the initial firing of the SA node. The P wave can display
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
as positive (upright), negative (inverted), or biphasic (both positive and negative).
ws ws ws ws ws ws ws ws ws ws
Question 2 of 4 ws ws ws
A patient asks the nurse, "Why do I need a 12-
ws ws ws ws ws ws ws ws ws ws
lead ECG if my heart rate is within normal limits?" The nurse responds by explainin
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
g that which heart conditions may be identified by the 12-lead ECG?
ws ws ws ws ws ws ws ws ws ws ws
Select all that apply.ws ws ws
Cardiotoxicity
Cardiac murmur ws
Irregular rhythm ws
Myocardial infarction ws
Heart valve deformation - ans-Cardiotoxicity
ws ws ws ws
The 12-lead ECG may show changes indicative of drug toxicity.
ws ws ws ws ws ws ws ws ws
Irregular rhythm ws
Obtaining 12- ws
lead ECG views of the heart is helpful in the assessment of dysrhythmias, or irregul
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
ar heart rhythms.
ws ws
Myocardial infarction ws
The 12- ws
lead ECG may show changes suggesting damage to the heart including ischemia an
ws ws ws ws ws ws ws ws ws ws ws ws
d myocardial infarction.
ws ws
Question 3 of 4 ws ws ws
Which ECG component would the nurse measure to identify the total time needed fo
ws ws ws ws ws ws ws ws ws ws ws ws ws
r ventricular depolarization and repolarization of a patient's heart?
ws ws ws ws ws ws ws ws
A
B
C
D - ans-D
ws ws
and correct answers
Question 1 of 4 ws ws ws
Match the property of the cardiac conduction system with its description.
ws ws ws ws ws ws ws ws ws ws
Property of the cell that allows it to accept initiation of stimulation
ws ws ws ws ws ws ws ws ws ws ws
-Excitability
Property that moves electrical impulse along a membrane
ws ws ws ws ws ws ws
-Conductivity
Ability of heart muscle to respond mechanically to an impulse
ws ws ws ws ws ws ws ws ws
-Contractility
Ability of heart muscle to initiate an impulse, begin stimulation
ws ws ws ws ws ws ws ws ws
-Automaticity - ans- ws ws
Question 2 of 4 ws ws ws
List in order the pathway of the normal cardiac impulse starting at the SA node.
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
The impulse causes the atria to contract.
ws ws ws ws ws ws ws
The impulse travels from the AV node through the bundle of His.
ws ws ws ws ws ws ws ws ws ws ws ws
The impulse divides into the left and right bundle branches.
ws ws ws ws ws ws ws ws ws ws
The impulse reaches the Purkinje fibers.
ws ws ws ws ws ws
The ventricles contract. - ans-
ws ws ws ws
Question 3 of 4 ws ws ws
An increase in the rate of cardiac impulse initiation is linked to stimulation of which
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
component?
Purkinje system ws
Electrolyte system ws
Sympathetic nervous system ws ws
Parasympathetic nervous system - ans-Sympathetic nervous system
ws ws ws ws ws ws
The sympathetic nervous system is responsible for increasing the rate of cardiac im
ws ws ws ws ws ws ws ws ws ws ws ws
pulse initiation at the SA node. It also assists with node impulse conduction and car
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
diac contractility.
ws
Question 4 of 4 ws ws ws
Which electrolytes play key roles in polarization of the heart cells?
ws ws ws ws ws ws ws ws ws ws
Sodium and potassium
ws ws
Potassium and calcium ws ws
Potassium and glucose ws ws
Sodium and magnesium - ans-Sodium and potassium
ws ws ws ws ws ws
, The electrolytes sodium and potassium are partners in cardiac function. A higher so
ws ws ws ws ws ws ws ws ws ws ws ws
dium level outside the cell allows for a high potassium and low sodium level inside t
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
he cell. Potassium inside the cell is required for the conduction of impulses to achie
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
ve a polarized state.
ws ws ws
Question 1 of 4 ws ws ws
Which wave on the ECG tracing will provide the nurse more information about atrial
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
depolarization?
A
B
C
D - ans-B
ws ws
The P wave demonstrates the initial firing of the SA node. The P wave can display
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws
as positive (upright), negative (inverted), or biphasic (both positive and negative).
ws ws ws ws ws ws ws ws ws ws
Question 2 of 4 ws ws ws
A patient asks the nurse, "Why do I need a 12-
ws ws ws ws ws ws ws ws ws ws
lead ECG if my heart rate is within normal limits?" The nurse responds by explainin
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
g that which heart conditions may be identified by the 12-lead ECG?
ws ws ws ws ws ws ws ws ws ws ws
Select all that apply.ws ws ws
Cardiotoxicity
Cardiac murmur ws
Irregular rhythm ws
Myocardial infarction ws
Heart valve deformation - ans-Cardiotoxicity
ws ws ws ws
The 12-lead ECG may show changes indicative of drug toxicity.
ws ws ws ws ws ws ws ws ws
Irregular rhythm ws
Obtaining 12- ws
lead ECG views of the heart is helpful in the assessment of dysrhythmias, or irregul
ws ws ws ws ws ws ws ws ws ws ws ws ws ws
ar heart rhythms.
ws ws
Myocardial infarction ws
The 12- ws
lead ECG may show changes suggesting damage to the heart including ischemia an
ws ws ws ws ws ws ws ws ws ws ws ws
d myocardial infarction.
ws ws
Question 3 of 4 ws ws ws
Which ECG component would the nurse measure to identify the total time needed fo
ws ws ws ws ws ws ws ws ws ws ws ws ws
r ventricular depolarization and repolarization of a patient's heart?
ws ws ws ws ws ws ws ws
A
B
C
D - ans-D
ws ws
