AACN-CMC : Cardiac Medicine Subspecialty Certification Exam

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AACN-CMC
Cardiac Medicine Subspecialty Certification
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Question: 35
35. Which atrioventricular block does not impair cardiac function?
A. Hemiblock
B. First-degree block
C. Mobitz I block
D. Right bundle branch block
Answer: B
A first-degree block does not impair cardiac function. It can be caused by
hyperkalemia, quinidine, digitalis, and ischemic heart disease.
Question: 36
36. What are some causes of a third-degree AV block?
A. Certain drugs, such as quinidine and atropine
B. Age, digitalis intoxication, or myocardial infarction
C. Heart disease and damage from uncontrolled diabetes mellitus
D. Hypertension, coronary artery disease, and cardiomyopathy
Answer: B
Some causes of a third-degree AV block are age, digitalis intoxication, and
myocardial infarction. This is also called a complete heart block because no
impulses are being transmitted from the atria to the ventricles.
Question: 37
37. In particular, which type of atrioventricular block patient would be a good
candidate for the implantation of a pacemaker?
A. Hemiblocks
B. Transmural ischemic blocks
C. Posterior fascicular block
D. Third-degree block
Answer: D
In particular, a patient with a third-degree atrioventricular block would be a good
candidate for the implantation of a pacemaker. This would accommodate for the
failure of the AV node to disseminate the necessary impulse from the atria to the
ventricles.
Question: 38
38. What condition may be indicated very early by an EKG with ST elevations, or
tall, upright T waves?
A. Sudden cardiac death
B. Myocardial ischemia
C. Transmural myocardial infarction
D. Coronary artery disease
Answer: C
Transmural myocardial infarction may be indicated very early by an EKG with
ST elevations, or tall, upright T waves. To make a better determination, the V1
and V2 leads may be viewed to determine if ventricular hypertrophy is evident.
Question: 39
39. Which electrolyte abnormality will show shortened ventricular repolarization
and shortened QT intervals on EKG?
A. Hypercalcemia
B. Hypocalcemia
C. Hyperkalemia
D. Hypokalemia
Answer: A
The electrolyte abnormality hypercalcemia will show shortened ventricular
repolarization and shortened QT intervals on EKG.
Question: 40
40. What does the horizontal aspect of the EKG measure?
A. Voltage
B. Duration
C. Watts
D. Waveforms
Answer: B
The horizontal aspect of the EKG measures duration. The smaller squares are .04
seconds in duration and the larger ones are .20 seconds in duration.

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