CCT - Practice Test Questions and 100% Correct Verified Answers
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Course
CCT
Institution
CCT
1. What does the T wave represent on an ECG?
a. Atrial depolarization
b. Ventricular depolarization
c. Atrial repolarization
d. Ventricular repolarization - Answer 11. D: Repolarization of the ventricles begins
immediately after the QRS. The T wave represents the final and more rapid phase of
...
CCT - Practice Test Questions and 100%
Correct Verified Answers
1. What does the T wave represent on an ECG?
a. Atrial depolarization
b. Ventricular depolarization
c. Atrial repolarization
d. Ventricular repolarization - Answer 11. D: Repolarization of the ventricles begins
immediately after the QRS. The T wave represents the final and more rapid phase of
that repolarization. Atrial depolarization is represented by the P wave. Ventricular
depolarization is represented by the QRS complex. Atrial repolarization is not seen on
the ECG.
2. What benefit does a thallium stress test have as compared to a standard ECG stress
test?
a. More quickly identifies areas of myocardial ischemia in the heart
b. The test is simpler to perform
c. More accurately identifies the specific areas of reduced blood flow in the heart
d. Is a safer test overall for the patient - Answer 12. C: Thallium stress tests, also known
as nuclear stress tests, gather more specific and accurate information than simple ECG
stress tests. It is a helpful test when trying to identify the severity of coronary artery
disease in a patient with known coronary disease.
3. Which of the following is the correct placement of chest leads for a 12-lead ECG?
a. V1 in the third intercostal space, immediately right of the sternum. V2 in the fourth
intercostal space, immediately left of the sternum. V3 midway between V2 and V4. V4 in
the fifth intercostal space, at the midclavicular line. V5 in the fourth intercostal space, at
the anterior axillary line. V6 in the third intercostal space, at the midaxillary line.
,b. V1 in the fourth intercostal space, immediately right of the sternum. V2 in the fifth
intercostal space, immediately right of the sternum. V3 in the fifth intercostal space,
immediately left of the sternum. V4 in the fifth intercostal space, at the midclavicular
line. V5 in the fifth intercostal space, at the anterior axillary line. V6 in the fifth
intercostal space, at the midaxillary line.
c. V1 in the fourth intercostal space, immediately right of the sternum. V2 in the four -
Answer 13. D: The appropriate placement of the chest leads is very important for
obtaining an accurate ECG. In order to determine whether the electrical activity of the
heart is normal or abnormal, and to determine more precisely what type abnormality is
present, it is necessary for these leads to be placed precisely and consistently. V1 and V2
are oriented over the right side of the heart, V3 and V4 are oriented over the
interventricular septum, and V5 and V6 are oriented over the left side of the heart.
4. How many leaflets does the mitral valve have?
a. One
b. Two
c. Three
d. Four - Answer 14. B: The mitral valve is a bicuspid valve, meaning that it has two
leaflets (also known as cusps). It is located between the left atrium and left ventricle.
The tricuspid valve, located between the right atrium and right ventricle, has three
leaflets. The pulmonic valve leads from the right ventricle to the pulmonary artery and
has three leaflets. The aortic valve leads from the left ventricle to the aorta and
normally has three leaflets.
5. What is being measured when determining the height or depth of a wave from the
baseline on an ECG?
a. Power
b. Current
c. Voltage
d. Resistance - Answer 15. C: The amplitude of waves as measured from the baseline is a
measure of voltage. Voltage is also known as electrical potential difference, and
therefore gives us a picture of the depolarization and repolarization of the heart. These
measurements are made in millimeters.
, 6. What is the most likely cause of the vertical, upwards spikes seen in the ECG strip
below?
a. Pacemaker firing
b. Spontaneous AV node firing
c. ECG leads placed too closely together
d. Heart block - Answer 16. A: These spikes are an artifact due to the firing of an
implanted pacemaker. In the above ECG the pacemaker is firing at regular intervals and
each spike is followed by a QRS complex and a T wave. This is a normal ECG for a patient
with a firing implanted pacemaker.
7. Which of the following is NOT an indication for Holter monitoring?
a. Assessing pacemaker function
b. Evaluating syncopal episodes
c. Assessing for ischemia
d. Evaluating for a new infarction - Answer 17. D: Holter (ambulatory) ECG monitoring
can be useful in evaluating cardiac rhythm abnormalities, assessing pacemaker and
implantable defibrillator function, assessing for ischemia, and evaluating heart rate
variability. Ambulatory ECGs can be used to rule out conditions that may be missed on
routine ECGs. Evaluation for an infarction should be done as an inpatient care since this
requires immediate treatment if a new infarction is present.
8. What is the difference between the first stage of the "Bruce protocol" stress test and
the first stage of the "Modified Bruce protocol" stress test?
a. The Modified Bruce protocol starts at the same gradient, but at a slower speed for the
first stage of the test.
b. The Modified Bruce protocol starts at the same speed, but at a lower gradient for the
first stage of the test.
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