2/14/25, 7:52 AM SHARP EKG (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CORRECT!! Flas…
SHARP EKG (2025) comprehensive questions
and verified detailed solutions ( MULTIPLE
CHOICES) |100% CORRECT!!
Save
Terms in this set (246)
What are the two basic 1. myocardial muscle cells
kinds of cardiac cells? 2. myocardial pacemaker cells
1. Automaticity
What are the 4 primary 2. Excitability
cell characteristics? 3. Conductivity
4. Contractility
What are the two major 1. sodium
ions that affect cardiac 2. potassium
function?
What are the primary ions Potassium
inside the cell?
What are the primary ions Sodium
outside the cell?
Distribution of ions on 1. membrane channels
either side of the 2. concentration gradient
membrane is determined 3. electrical gradient
by which several factors? 4. sodium-potassium pump
Where is the SA node In the upper wall of the right atrium/near the inlet of
located? the superior vena cava
What is the intrinsic rate 60-100 bpm
of the SA node?
https://quizlet.com/1005923879/sharp-ekg-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-correct-flash-car… 1/27
,2/14/25, 7:52 AM SHARP EKG (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CORRECT!! Flas…
Pacemaker cells in the AV 40-60 bpm
junction generate
electrical impulses at
what rate?
1. slow conduction of the electrical impulse through
the AV node to allow atria to empty into the
What are the 3 functions
ventricles (atrial kick)
of the AV node?
2. to serve as a back pack pacemaker
3. protect ventricles from fast rates
After the delay in the AV To the bundle of His
node, where does the
impulse go?
The Bundle of His (AV Bundle) runs from the AV
What is the function of node through the IV septum, splitting into R. and L.
the bundle of His? branches and eventually breaking into Purkinje
fibers as it spreads through the ventricular walls
What is the rate of 30-40 bpm
electrical impulse the
Purkinje Fibers have?
What does the P wave atrial depolarization
represent?
When does atrial during the QRS complex
repolarization occur?
What does the QRS wave ventricular depolarization
represent?
What does the ST early ventricular repolarization
segment represent?
What does the T wave ventricular repolarization
represent?
What does the QT the time of ventricular activity including both
interval represent? depolarization and repolarization
What are the two 1. Absolute refractory period
refectory phases of the 2. Relative refractory period
cardiac cycle?
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, 2/14/25, 7:52 AM SHARP EKG (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CORRECT!! Flas…
The cardiac cells are unable to respond to an
What is "absolute
electrical stimulus (from the onset of the QRS to the
refractory period"?
peak of the T wave)
The cardiac cells have depolarized sufficiently to
What is the "relative
respond to a strong stimulus (peak of T wave to end
refractory period"?
of T wave)
A small square on EKG 0.04
paper is how long?
A big square on EKG 0.2
paper is how long?
How long is a P wave? < .10
What is the duration of 0.12-0.20
the PR interval?
What is the duration of < .10
the QRS?
1. a electrical impulse that originated in an ectopic
site in the ventricles
What are some causes of
2. BBB
a abnormally wide QRS?
3. an electrical impulse that went thru a accessory
conduction pathway that bypasses the AV node
1. STEMI
2. Coronary artery spasm (Printzmetal angina)
What are some causes of
3. hyperkalemia
a ST elevation?
4. hypothermia
5. ventricular aneurysm
1) NSTEMI
2) Digoxin
What are some causes of
3) Hypokalemia
ST depression?
4) RBBB or LBBB
5) RVH or LVH
https://quizlet.com/1005923879/sharp-ekg-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-correct-flash-car… 3/27
SHARP EKG (2025) comprehensive questions
and verified detailed solutions ( MULTIPLE
CHOICES) |100% CORRECT!!
Save
Terms in this set (246)
What are the two basic 1. myocardial muscle cells
kinds of cardiac cells? 2. myocardial pacemaker cells
1. Automaticity
What are the 4 primary 2. Excitability
cell characteristics? 3. Conductivity
4. Contractility
What are the two major 1. sodium
ions that affect cardiac 2. potassium
function?
What are the primary ions Potassium
inside the cell?
What are the primary ions Sodium
outside the cell?
Distribution of ions on 1. membrane channels
either side of the 2. concentration gradient
membrane is determined 3. electrical gradient
by which several factors? 4. sodium-potassium pump
Where is the SA node In the upper wall of the right atrium/near the inlet of
located? the superior vena cava
What is the intrinsic rate 60-100 bpm
of the SA node?
https://quizlet.com/1005923879/sharp-ekg-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-correct-flash-car… 1/27
,2/14/25, 7:52 AM SHARP EKG (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CORRECT!! Flas…
Pacemaker cells in the AV 40-60 bpm
junction generate
electrical impulses at
what rate?
1. slow conduction of the electrical impulse through
the AV node to allow atria to empty into the
What are the 3 functions
ventricles (atrial kick)
of the AV node?
2. to serve as a back pack pacemaker
3. protect ventricles from fast rates
After the delay in the AV To the bundle of His
node, where does the
impulse go?
The Bundle of His (AV Bundle) runs from the AV
What is the function of node through the IV septum, splitting into R. and L.
the bundle of His? branches and eventually breaking into Purkinje
fibers as it spreads through the ventricular walls
What is the rate of 30-40 bpm
electrical impulse the
Purkinje Fibers have?
What does the P wave atrial depolarization
represent?
When does atrial during the QRS complex
repolarization occur?
What does the QRS wave ventricular depolarization
represent?
What does the ST early ventricular repolarization
segment represent?
What does the T wave ventricular repolarization
represent?
What does the QT the time of ventricular activity including both
interval represent? depolarization and repolarization
What are the two 1. Absolute refractory period
refectory phases of the 2. Relative refractory period
cardiac cycle?
https://quizlet.com/1005923879/sharp-ekg-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-correct-flash-car… 2/27
, 2/14/25, 7:52 AM SHARP EKG (2025) comprehensive questions and verified detailed solutions ( MULTIPLE CHOICES) |100% CORRECT!! Flas…
The cardiac cells are unable to respond to an
What is "absolute
electrical stimulus (from the onset of the QRS to the
refractory period"?
peak of the T wave)
The cardiac cells have depolarized sufficiently to
What is the "relative
respond to a strong stimulus (peak of T wave to end
refractory period"?
of T wave)
A small square on EKG 0.04
paper is how long?
A big square on EKG 0.2
paper is how long?
How long is a P wave? < .10
What is the duration of 0.12-0.20
the PR interval?
What is the duration of < .10
the QRS?
1. a electrical impulse that originated in an ectopic
site in the ventricles
What are some causes of
2. BBB
a abnormally wide QRS?
3. an electrical impulse that went thru a accessory
conduction pathway that bypasses the AV node
1. STEMI
2. Coronary artery spasm (Printzmetal angina)
What are some causes of
3. hyperkalemia
a ST elevation?
4. hypothermia
5. ventricular aneurysm
1) NSTEMI
2) Digoxin
What are some causes of
3) Hypokalemia
ST depression?
4) RBBB or LBBB
5) RVH or LVH
https://quizlet.com/1005923879/sharp-ekg-2025-comprehensive-questions-and-verified-detailed-solutions-multiple-choices-100-correct-flash-car… 3/27
