Basic EKG Exam Questions With Accurate
Solutions 2025\2026 A+ Grade
EKGs are graphic representations of _______ within the heart, NOT _______.
- accurate answers-electrical activity
mechanical function
What can you use to evaluate mechanical function when you're doing an EKG?
- accurate answers-check blood pressure and peripheral pulses
What kind of disturbances CAN EKG tell you about with electrical function?
- accurate answers-rhythm disturbances
conduction disturbances
What kind of problems CAN'T EKG tell you about?
- accurate answers-mechanical function, including:
-structural disorders
-perfusion disorders
What two electrolytes are most important for electrical impulse formation,
and what are the normal ranges?
- accurate answers-Potassium: 3.5-5.5
Sodium: 135-145
Polarization is the _______ state. Depolarization is __________. Repolarization is
_________.
- accurate answers-Ready
Discharge
Recovery
What is the inherent rate of the sinus node?
- accurate answers-60-100 bpm
What is the inherent rate of the AV junction?
- accurate answers-40-60 bpm
What is the inherent rate of the ventricles?
- accurate answers-20-40 bpm
, Rates above 200 typically originate in the _______, not the SA node.
- accurate answers-atria
What is the pacemaker rule?
- accurate answers-The pacemaker site with the fastest rate will generally
control the heart.
Describe what happens with irritability of the myocardium.
- accurate answers-a site in the myocardium has a localized electrolyte
imbalance, conducts electricity more rapidly and overrides the higher
pacemaker sites.
Describe the heart's "escape mechanism."
- accurate answers-The normal pacemaker slows down or fails, and a lower
pacing site assumes pacemaking responsibility.
When electricity flows toward the NEGATIVE electrode, the patterns
produced on the graph will be ______.
- accurate answers-inverted
When electricity flows toward the POSITIVE electrode, the patterns produced
on the graph will be ______.
- accurate answers-upright
Which lead is most important for monitoring base rhythm, and why?
- accurate answers-Lead 2
because it is closest to the heart
Each small box on the graph paper represents _____ seconds. Each large box
represents ______ seconds.
- accurate answers-0.04
0.2
Each cardiac cycle should produce what 2 things?
- accurate answers-1. P-QRS-T on the EKG
2. palpable pulse
Solutions 2025\2026 A+ Grade
EKGs are graphic representations of _______ within the heart, NOT _______.
- accurate answers-electrical activity
mechanical function
What can you use to evaluate mechanical function when you're doing an EKG?
- accurate answers-check blood pressure and peripheral pulses
What kind of disturbances CAN EKG tell you about with electrical function?
- accurate answers-rhythm disturbances
conduction disturbances
What kind of problems CAN'T EKG tell you about?
- accurate answers-mechanical function, including:
-structural disorders
-perfusion disorders
What two electrolytes are most important for electrical impulse formation,
and what are the normal ranges?
- accurate answers-Potassium: 3.5-5.5
Sodium: 135-145
Polarization is the _______ state. Depolarization is __________. Repolarization is
_________.
- accurate answers-Ready
Discharge
Recovery
What is the inherent rate of the sinus node?
- accurate answers-60-100 bpm
What is the inherent rate of the AV junction?
- accurate answers-40-60 bpm
What is the inherent rate of the ventricles?
- accurate answers-20-40 bpm
, Rates above 200 typically originate in the _______, not the SA node.
- accurate answers-atria
What is the pacemaker rule?
- accurate answers-The pacemaker site with the fastest rate will generally
control the heart.
Describe what happens with irritability of the myocardium.
- accurate answers-a site in the myocardium has a localized electrolyte
imbalance, conducts electricity more rapidly and overrides the higher
pacemaker sites.
Describe the heart's "escape mechanism."
- accurate answers-The normal pacemaker slows down or fails, and a lower
pacing site assumes pacemaking responsibility.
When electricity flows toward the NEGATIVE electrode, the patterns
produced on the graph will be ______.
- accurate answers-inverted
When electricity flows toward the POSITIVE electrode, the patterns produced
on the graph will be ______.
- accurate answers-upright
Which lead is most important for monitoring base rhythm, and why?
- accurate answers-Lead 2
because it is closest to the heart
Each small box on the graph paper represents _____ seconds. Each large box
represents ______ seconds.
- accurate answers-0.04
0.2
Each cardiac cycle should produce what 2 things?
- accurate answers-1. P-QRS-T on the EKG
2. palpable pulse
