EKG INTERPRETATION COMPREHENSIVE TEST SCRIPT 2026 FULL QUESTIONS AND CORRECT ANSWERS GRADED A+

EKG INTERPRETATION COMPREHENSIVE
TEST SCRIPT 2026 FULL QUESTIONS AND
CORRECT ANSWERS GRADED A+

●● Question 2 of 4
List in order the pathway of the normal cardiac impulse starting at the
SA node.
The impulse causes the atria to contract.
The impulse travels from the AV node through the bundle of His.
The impulse divides into the left and right bundle branches.
The impulse reaches the Purkinje fibers.
The ventricles contract..
Answer:


●● Question 3 of 4
An increase in the rate of cardiac impulse initiation is linked to
stimulation of which component?
Purkinje system
Electrolyte system
Sympathetic nervous system
Parasympathetic nervous system.
Answer: Sympathetic nervous system

, The sympathetic nervous system is responsible for increasing the rate of
cardiac impulse initiation at the SA node. It also assists with node
impulse conduction and cardiac contractility.


●● Question 4 of 4
Which electrolytes play key roles in polarization of the heart cells?
Sodium and potassium
Potassium and calcium
Potassium and glucose
Sodium and magnesium.
Answer: Sodium and potassium
The electrolytes sodium and potassium are partners in cardiac function.
A higher sodium level outside the cell allows for a high potassium and
low sodium level inside the cell. Potassium inside the cell is required for
the conduction of impulses to achieve a polarized state.


●● Question 1 of 4
Which wave on the ECG tracing will provide the nurse more
information about atrial depolarization?
A
B
C
D.
Answer: B