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GMS 6474 EXAM QUESTIONS WITH
VERIFIED SOLUTIONS
How to calculate HR on an EKG - correct-answer - 300 divided by the number of
big boxes between R waves (peaks)
A 30-year-old man had his EKG measured at his physician's office, but his records
were lost. The EKG technician remembered that the QRS deflection was large and
positive in lead aVF and 0 in lead I. What is the mean electrical axis?
30
not enough information
90
45 - correct-answer - 90
Which part of the heart has the slowest conduction velocity?
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Aortic valve
Pulmonary artery
AV node
Purkinje fibers
Bundle of His - correct-answer - av node
Because of the placement of the positive electrodes, and the predominant
direction of the depolarization wave of the heart, the QRS complex is ________ in
lead I and II.
neutral
positive
negative
isoelectric - correct-answer - positive
A patient presents at the Emergency Department with dizziness and fainting. The
ECG trace shows 2 PQRST waves, followed by 1 P-wave, with no QRST complex.
Which of the following is the most likely clinical diagnosis of this patient?
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Sinus bradycardia
Third degree heart block
Sinus tachycardia
Second-degree heart block, Mobitz Type I
Second-degree heart block, Mobitz Type II - correct-answer - Second-degree heart
block, Mobitz Type II
The binding of epinephrine and norepinephrine to the b1-receptor on the heart
will result in all of the following EXCEPT,
Increased contractility
Increased heart rate
Decreased rate of relaxation
Increased stroke volume
Increased venous return - correct-answer - Increased venous return
GMS 6474 EXAM QUESTIONS WITH
VERIFIED SOLUTIONS
How to calculate HR on an EKG - correct-answer - 300 divided by the number of
big boxes between R waves (peaks)
A 30-year-old man had his EKG measured at his physician's office, but his records
were lost. The EKG technician remembered that the QRS deflection was large and
positive in lead aVF and 0 in lead I. What is the mean electrical axis?
30
not enough information
90
45 - correct-answer - 90
Which part of the heart has the slowest conduction velocity?
,2|Page
Aortic valve
Pulmonary artery
AV node
Purkinje fibers
Bundle of His - correct-answer - av node
Because of the placement of the positive electrodes, and the predominant
direction of the depolarization wave of the heart, the QRS complex is ________ in
lead I and II.
neutral
positive
negative
isoelectric - correct-answer - positive
A patient presents at the Emergency Department with dizziness and fainting. The
ECG trace shows 2 PQRST waves, followed by 1 P-wave, with no QRST complex.
Which of the following is the most likely clinical diagnosis of this patient?
, 3|Page
Sinus bradycardia
Third degree heart block
Sinus tachycardia
Second-degree heart block, Mobitz Type I
Second-degree heart block, Mobitz Type II - correct-answer - Second-degree heart
block, Mobitz Type II
The binding of epinephrine and norepinephrine to the b1-receptor on the heart
will result in all of the following EXCEPT,
Increased contractility
Increased heart rate
Decreased rate of relaxation
Increased stroke volume
Increased venous return - correct-answer - Increased venous return
