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The current enters the electrocardiograph through the wires to reach the amplifier, which does which of the following to the impulses?
a. Decreases
b. Enlarges
c. Shrinks
d. Flattens
b. enlarges
An ECG tracing of the cardiac cycle or heartbeat consists of a P wave, a QRS complex, and a(n) ___.
T wave
ECG is a recording of the electrical impulses of the heart ___.
muscle
AC (alternating current) interference is caused by ___.
electrical acitivity
The usual standardization mark is:
a. 1 mm wide and 5 mm high.
b. 2 mm wide and 10 mm high.
c. 2 mm wide and 5 mm high.
d. 3 mm wide and 15 mm high.
b. 2 mm wide and 10 mm high
The ___ of the ECG is necessary to enable a provider to judge deviations from the standard.
standardization
In performing a stress test, a technician will attach flat, sticky patches called electrodes to the patient's chest. How many are attached?
a. Five
b. Seven
c. Ten
d. Twelve
c. ten
When performing an echocardiograph, a device (similar to a microphone) sends and receives sound waves and records them. This is known as a:
a. recorder.
b. transducer.
c. stereo.
d. video.
b. transducer
Patients who have routine normal ECGs but still have intermittent or irregular chest pain or discomfort are often tested over a period of 24 hours or more by a device known as a(n) ___.
Holter monitor
Each large square on the ECG paper measures 5 mm by 5 mm and represents ____ seconds.
a. 0.1
b. 0.2
c. 0.04
d. 1.0
b. 0.2
A heated pen-like instrument that produces a printed representation on the ECG paper is known as a(n):
a. amplifier.
b. galvanometer.
c. stylus.
d. electrode.
c. stylus
What can you do with the sensitivity dial if the ECG tracing is too small?
a. Turn down to 1/2
b. Turn up to 5
c. Turn down to 1
d. Turn up to 2
d. turn up to 2.
The routine ECG consists of how many leads?
a. 4
b. 10
c. 12
d. 6
c. 12
The augmented leads are also known as:
a. aVL, aVR, aVF.
b. precordial leads.
c. leads I, II, and III.
d. chest leads.
a. aVL, aVR, aVF
Which of the following wave(s) on the graph paper represents the repolarization of the ventricles or the time of recovery before another contraction?
a. ST
b. P
c. T
d. QRS
c. T
The following is a diagnostic tool that tests the structure and function of the heart through the use of sound waves reflected through the heart.
a. Holter monitor
b. Defibrillator
c. Treadmill
d. Echocardiography
d. Echocardiography
What kind of interference is caused by improperly applied electrodes?
a. Wandering baseline
b. Interrupted baseline
c. Somatic tremor
d. AC interference
a. wandering baseline
When instructing a patient on the stress test procedure, they should be instructed to:
a. arrive 2 hours early.
b. limit their food intake.
c. wear loose clothing.
d. have a physical prior.
c. wear loose clothing
Patients with various neurological disorders can produce this on an ECG tracing:
a. AC interference
b. Muscle voltage artifacts
c. A wandering baseline
d. An interrupted baseline
b. muscle voltage artifacts
The heart is a:
a. two-chambered pump.
b. three-chambered pump.
c. four-chambered pump.
d. five-chambered pump.
c. four-chambered pump
When patients are wearing a Holter monitor they should be instructed to:
a. limit activities.
b. continue daily activities.
c. exercise more.
d. sleep while recording rhythms.
b. continue daily activities
An echocardiography is a __________________ diagnostic tool that tests the structure and function of the heart through sound waves.
a. small
b. noninvasive
c. large
d. invasive
b. noninvasive
Having an ECG can detect all of the following EXCEPT:
a. Enlargement of the heart
b. Heart attacks
c. Abnormal liver function
d. Disturbances in heart rhythm
c. abnormal liver function
The total time of a stress test is approximately ____ minutes.
60
On the nondigital electrocardiograph, the ____ , a heated pen-like instrument, produces a printed representation on the ECG paper.
stylus
A procedure frequently used in the diagnosis of heart disease and dysfunction is the ____.
electrocardiogram
What can you do with the sensitivity dial if the ECG tracing is too large?
a. Turn down to 1/2
b. Turn up to 5
c. Turn down to 1
d. Turn up to 2
a. turn down to 1/2
Irregularities in the heart's rhythm are known as ___.
arrhythmias
The standardization mark should be indicated ____ of each lead to provide a reliable reading.
in the front
A(n)____ is designed to provide counter shock to convert cardiac arrhythmias into regular sinus rhythm.
defibrillator
When preparing a patient for an ECG, you should tell the patient:
a. the actual test will only take several minutes.
b. the machine does not put electricity into the body.
c. that the patient will not feel anything from the procedure.
d. All of the above
d. all of the above
