ASET- EKG Final Exam Questions with Correct Answers Latest Update 2025 Graded A+
Where in the heart is the SA node located? - Answers right atrium
What is the next location an action potential travels to after activating the AV node? - Answers Bundle of
His
____________ causes shortening of the ST segment, whereas ___________ lengthens the ST segment. -
Answers Hypercalcemia; hypocalcemia
What is a general rule that applies to the use of digitalis? - Answers Any arryhthmia and all degrees of
AV block are possible with digitalis therapy.
Digitalis therapeutic effect produces a characteristic ____________ scooping. - Answers ST-T Complex
_______________ can prolong the QRS complex and QT intervals and cause sinus tachycardia. - Answers
Digitalis Glycosides or Digoxin
Where should the standardization mark be measured on the electrocardiogram to ensure accuracy? -
Answers 10 mm
A normal P wave does not exceed ____ and in amplitude and is smaller than ____ wide. - Answers Does
not exceed 2.5 mm; is smaller than 3 mm wide
Which leads are prominent U waves the most apparent? - Answers V2 to V4
_____________ is the point where the QRS complex ends, and the ST segment begins. J Point - Answers
J-Point
Which rhythm is most likely to appear in a patient with hyperkalemia? - Answers Sinus Bradycardia
_____________ is a slight beat-to-beat variation when the SA node does not pace the heart perfectly. -
Answers Sinus Arrhythmia
What is the cause of sinus tachycardia? - Answers Intravascular Volume Loss
Cardiac enlargement of the right atrium ____ the voltage of the P wave. - Answers Increases
An _________ more significant than the ________ is suggestive of right ventricular hypertrophy. -
Answers R wave; S wave
Sinus tachycardia is common during pain or ___________. - Answers Pulmonary Embolism, Myocarditis,
and Pericardial Effusion
The septum depolarizes _____ to _____ in LBBB. - Answers Right-to-left
Classical MI signs DO NOT include: - Answers Headache behind the eyes
, T wave inversion in RBBB is considered a _____ change. - Answers Secondary
A ST depression of at least _______, lasting at least ______ seconds, will confirm a positive stress test. -
Answers 1 mm; 0.08 sec
The P waves can hide in the QRS complex of atrial flutter. - Answers False
PACs can initiate arrhythmias by either ______ or _____ processes. - Answers Focal; Reentrant
How is a patient with abnormal WPW pattern with symptomatic tachycardia cured? - Answers Ablation
Sawtooth F waves are characteristic of which rhythm? - Answers Atrial Flutter
What is the term that refers to a PVC that appears between two regular beats? - Answers Interpolated
Which is NOT a basic pattern during cardiac arrest? - Answers Torsades Pointes
Where do PVCs originate from? - Answers Either left or right ventricle
Structurally unhealthy hearts with sustained left ventricular function can support cardiac output and
endurance high VT rates over 200 beats per minute without or few symptoms. FALSE. - Answers False
What are the only shockable sudden cardiac arrest rhthms? - Answers Both VT and VF
First degree heart block is characterized by a PR interval prolongation of more than _________. -
Answers 0.20
Characteristics of an infranodal block include: - Answers Slow, unstable escape rhythm
Pure nodal and His bundle escape rhythms produce a rate between ___ and ___ beats per minute. -
Answers 40; 60
AV Wenckebach and Mobitz II are considered second degree heart blocks. TRUE - Answers True
Medications that cause ________ will worsen conduction in the infranodal block. - Answers Tachycardia
The sudden appearance of a single, nonconducted P wave without PR prolongation is characterized as: -
Answers Mobitz Type 2
The _________ is the heart's primary pacemaker and the __________ is an example of a secondary
pacemaker. - Answers SA Node; His-Purkinje Network
What is the cause of hypokalemia developing with digoxin toxicity? - Answers Blockage of the sodium-
potassium pump
What is the range of therapeutic digoxin serum concentration? - Answers 0.5 to 2 ng/mL
Pacing will create ________ QRS complexes. - Answers Wide
Where in the heart is the SA node located? - Answers right atrium
What is the next location an action potential travels to after activating the AV node? - Answers Bundle of
His
____________ causes shortening of the ST segment, whereas ___________ lengthens the ST segment. -
Answers Hypercalcemia; hypocalcemia
What is a general rule that applies to the use of digitalis? - Answers Any arryhthmia and all degrees of
AV block are possible with digitalis therapy.
Digitalis therapeutic effect produces a characteristic ____________ scooping. - Answers ST-T Complex
_______________ can prolong the QRS complex and QT intervals and cause sinus tachycardia. - Answers
Digitalis Glycosides or Digoxin
Where should the standardization mark be measured on the electrocardiogram to ensure accuracy? -
Answers 10 mm
A normal P wave does not exceed ____ and in amplitude and is smaller than ____ wide. - Answers Does
not exceed 2.5 mm; is smaller than 3 mm wide
Which leads are prominent U waves the most apparent? - Answers V2 to V4
_____________ is the point where the QRS complex ends, and the ST segment begins. J Point - Answers
J-Point
Which rhythm is most likely to appear in a patient with hyperkalemia? - Answers Sinus Bradycardia
_____________ is a slight beat-to-beat variation when the SA node does not pace the heart perfectly. -
Answers Sinus Arrhythmia
What is the cause of sinus tachycardia? - Answers Intravascular Volume Loss
Cardiac enlargement of the right atrium ____ the voltage of the P wave. - Answers Increases
An _________ more significant than the ________ is suggestive of right ventricular hypertrophy. -
Answers R wave; S wave
Sinus tachycardia is common during pain or ___________. - Answers Pulmonary Embolism, Myocarditis,
and Pericardial Effusion
The septum depolarizes _____ to _____ in LBBB. - Answers Right-to-left
Classical MI signs DO NOT include: - Answers Headache behind the eyes
, T wave inversion in RBBB is considered a _____ change. - Answers Secondary
A ST depression of at least _______, lasting at least ______ seconds, will confirm a positive stress test. -
Answers 1 mm; 0.08 sec
The P waves can hide in the QRS complex of atrial flutter. - Answers False
PACs can initiate arrhythmias by either ______ or _____ processes. - Answers Focal; Reentrant
How is a patient with abnormal WPW pattern with symptomatic tachycardia cured? - Answers Ablation
Sawtooth F waves are characteristic of which rhythm? - Answers Atrial Flutter
What is the term that refers to a PVC that appears between two regular beats? - Answers Interpolated
Which is NOT a basic pattern during cardiac arrest? - Answers Torsades Pointes
Where do PVCs originate from? - Answers Either left or right ventricle
Structurally unhealthy hearts with sustained left ventricular function can support cardiac output and
endurance high VT rates over 200 beats per minute without or few symptoms. FALSE. - Answers False
What are the only shockable sudden cardiac arrest rhthms? - Answers Both VT and VF
First degree heart block is characterized by a PR interval prolongation of more than _________. -
Answers 0.20
Characteristics of an infranodal block include: - Answers Slow, unstable escape rhythm
Pure nodal and His bundle escape rhythms produce a rate between ___ and ___ beats per minute. -
Answers 40; 60
AV Wenckebach and Mobitz II are considered second degree heart blocks. TRUE - Answers True
Medications that cause ________ will worsen conduction in the infranodal block. - Answers Tachycardia
The sudden appearance of a single, nonconducted P wave without PR prolongation is characterized as: -
Answers Mobitz Type 2
The _________ is the heart's primary pacemaker and the __________ is an example of a secondary
pacemaker. - Answers SA Node; His-Purkinje Network
What is the cause of hypokalemia developing with digoxin toxicity? - Answers Blockage of the sodium-
potassium pump
What is the range of therapeutic digoxin serum concentration? - Answers 0.5 to 2 ng/mL
Pacing will create ________ QRS complexes. - Answers Wide
