ECG Quiz#3
How many leads does the Holter monitor contain?
5
___________ the ECG procedure is very important for health care reimbursement.
Documenting
Which of the following can be made of foam, cloth, or wet gel and come in various sizes from neonate, infant, pediatric, and adult?
Electrodes
What are leads called that carry no current?
Ground
What type of ECG is obtained with a 24-48 hour monitoring ECG machine?
Holter
What is the main reason that precordial leads are not placed where they belong?
Obesity
Electrodes have a shelf life of approximately how many years?
Two
What wave is thought to represent repolarization of the Purkinje fibers?
U
Which of the following is the amount of electrical stimulus or the difference in action potential created by cardiac cell movement within the heart?
Voltage
Which of the following shows up on an ECG tracing as a curved or spiked line either above or below the isoelectric line?
Wave
Normal sinus
Which of the following heart rhythms, as shown in the figure below, must have all the normal rhythm values plus the P wave must be upright and uniform in Lead II and the rhythm must be consistent with very little deviation?
In any artifact, the indication of wavelength errors is not created by the ____________.
heart
A lead that records the current in only one direction is called a _________ lead.
unipolar
A ___________ is a graphical record which is made up of lines showing the direction and strength of electrical forces.
vector
Which of the following occurs during a normal PR segment?
Atrial depolarization
Stress, exercise, general health, previous cardiac events, even sleeping can all alter the heart rate. What type of heart rate does the ECG tracing in the figure below represent?
Bradycardia
Which of the following is calculated by using the horizontal axis on an ECG strip?
Heart rate
What is the R-R interval used to measure?
Heartbeat rate and regularity
Where is precordial Lead V4 positioned?
In the 5th intercostal space along a point of reference called the mid-clavicular line
In placing precordial leads, be sure to affix all the electrodes on the left side of the sternum with the exception of which lead?
Lead V1
The electrode for what lead is placed on the right side of the sternum at the 4th intercostal space?
Lead V1
Which precordial lead provides a transverse plane view of the interventricular septum of the heart?
Lead V1
On an ECG, what measures the direction and intensity of voltage being discharged by the heart at a specific time?
Leads
Which of the following is the first step in patient preparation?
Obtaining proper patient consent
When the sinoatrial node begins the electrical impulse, which of the following waves is created on the grid as both the right and left atria are depolarized?
P wave
According to the North American limb lead color code, what color is used for the left leg (LL)?
Red
What type of heart rhythm deviates from a normal rhythm on a regular basis and usually occurs as a patterned event?
Regularly irregular rhythm
Which of the following limb lead reversal errors does this ECG tracing represent?
Reversal of left arm and right arm leads
The three lead ECG uses only which of the following lead combinations?
Right and left arm leads and left leg lead
What type of ECG test is completed while the patient is exercising using the ECG machine and a treadmill or stationary exercise bike?
Stress
What is the purpose of an electrocardiogram?
To measure heart muscle activity
Which of the following waves sometimes appears as a result of certain antiarrhythmic drug effects, drug toxicity, or electrolyte imbalances?
U wave
What does the five lead ECG primarily diagnose?
Ventricular dysrhythmias
What lead is orientated toward the left ventricle's inferior wall?
aVF lead
The ventricular relaxation phase is also called ventricular ____________.
diastole
A heart in ____________ can become deadly with the loss of blood circulation and pulse.
fibrillation mode
All six precordial leads are considered _____________leads.
positive unipolar
A __________ view means that the view of a particular wall can be viewed from more than one angle or that additional lead views will provide alternative views when a heart injury is suspected.
reciprocal
A ___________ on the ECG strip is a "time period" with no electrical activity occurring between waves, and if normal, looks like a flat line.
segment
The morphology of a normal S wave is a ______________.
small, negative, spiked deflection
