Electrocardiography
Which of the following best describes the contraction of the cardiac cells from the electrical discharge?
Depolarization
Which of the following artifacts can be caused by poor quality of electrolyte gel?
Wandering baseline
which of the following atrial arrhythmia is characterized by extremely rapid incomplete contractions?
atrial fibrillation.
Which of the following procedures involves taking a portion of a vein (typically the Saphenous) and transplanting it into one or more of the hearts' coronary arteries?
coronary artery bypass
During a coronary balloon angioplasty, a catheter with a deflated balloon is inserted into which of the following arteries?
femoral
An electrocardiograph paper is
heat sensitive
Why would the medical assistant place the power cord pointing away from the patient and not allow the cable to go underneath the table?
helps reduce AC interference
Where is the lead for a V6 reading placed?
horizontal to V4 at left midaxillary line
Which of the following would not result in somatic tremor artifact?
improper grounding of the ECG machine
Which of the following is not a characteristic of a three-channel or multi-channel electrocardiogram?
it records one lead at a time
Which of the following is an important part of the patient education when preparing a patient to wear a Holter monitor?
keep a diary of the times of all symptomatic activities and emotions.
Which of the following would not need to be recorded in the Holter monitor patient activity diary?
name of nearest relative
What is the term used to refer to an ECG reading that is within normal limits?
normal sinus rhythm
What does the cardiac cycle represent?
one heartbeat.
Which of the following represents an error in technique when running an electrocardiogram?
positioning the machine so that the power cord runs under the patient table.
Which of the following ventricular arrhythmia is considered a common disturbance in the rhythm?
premature ventricular contraction
If the electrocardiograph is properly standardized, the standardization mark should be how high?
10mm
The standard electrocardiogram shows the heart's electrical activity from different angles through "leads". How many leads are recorded?
12
Which of the following artifacts can be caused by electrical interference?
AC interference
Why should the ECG tracing be performed in a quiet, warm exam room away from electrical equipment?
Artifacts are reduced.
What is the next step in the ECG procedure after the electropad sensors are removed?
Assist the patient as needed.
Which of the following best describes what the P wave represents?
Atrial depolarization.
Which of the following best describes Leads I, II, and III?
Bipolar leads
Which of the following converts cardiac arrhythmia into normal sinus rhythm?
Cardioversion.
Which of the following is a device placed on the skin that picks up electrical impulses given off by the heart?
Electrode
Which of the following best describes an electrocardiogram?
Graphic representation of the heart's electrical activity
which of the small deices sends a small dose of electricity to jar the heart back into a normal rhythm?
ICD
Which of the following occurs if the metal tip of a lead wire becomes detached from an electrode?
Interrupted baseline
Which of the following is the lead that records electrical activity between the right arm and the left leg?
Lead II
Which of the following is a true statement about ventricular tachycardia?
Ventricular fibrillation is life threatening.
Which of the following indicates ventricular depolarization?
QRS complex.
Which of the following electrodes is not used as part of the recording?
RL
where does oxygenated blood enter the heart?
Right atrium.
What is the name of the body's natural pacemaker?
SA node
Which of the following best describes the electrical conduction system of the heart?
SA node to Purkinje fibers.
Why should an electrolyte be used when running an ECG?
The skin is a poor conductor of electricity.
Which of the following is true about a treadmill stress test?
The stress test is monitored closely by the provider
Which of the following is a reason to have an EKG?
a. detects myocardial ischemia b. estimates damage from MI c. evaluates arrhythmia d. assesses cardiac medication on the heart E--all the above..............
Which of the following best describes how the augmented leads are recorded?
after the bipolar leads
Which of the following describes when the myocardial cells recovers electrically?
re-polarization
Which of the following tests requires injecting the patient with a radioactive substance?
thallium stress test.
Which of the following is NOT true about Holter monitor electrodes?
there are only 6-7 electrodes used.
Which of the following best describes the function of standardization or calibration of the EKG machine?
to determine whether the machine is set and working properly.
Why are electrodes applied to the fleshy part of a limb?
to minimize artifacts.