The PR interval can be defined as which of the following?
B. Isoelectric portion of the interval that precedes ventricular depolarization.
The R wave can be defined as which of the following?
C. First positive area produced by depolarization of the ventricles.
The S wave can be defined as which of the following?
A. First negative area that follows an R wave during depolarization of the ventricles.
The P wave can be defined as which of the following?
A. It represents the depolarizing of the atria, when they start to contract.
The QRS complex can be defined as which of the following?
A. It represents the depolarization of the ventricles, it represents a ventricular impulse.
The ST segment can be defined as which of the following?
C. It is the point where the tracing turns right, in a myocardial infarction this segment will be elevated.
The U wave can be defined as which of the following?
C. Is sometimes seen. Can mean electrolyte problem (K decrease). May be normal for that patient
The QT interval can be defined as which of the following?
A. is measured from the beginning of the Q wave through where the wave is completed.
Which of the following information must be used to label an EKG when the EKG machine does NOT automatically label the strip?
D. All of the above
The vertical scale of the ECG paper measures which of the following?
C. Voltage
The position control on the EKG machine on each machine tells the technician which of the following?
D. All of the above
When would the technician need to adjust the paper speed?
A. Both A&B
Which of the following is the internationally accepted standard speed for the EKG recording?
A. 25 mm/sec
In the early 1900's a physiologist invented the EKG machine. The augmented lead triangle is named after him, what is the name of the triangle?
D. None of the above
How many electrodes make up the 12 lead EKG ?
D. 10
If there is a lot of interference on the EKG tracing, which of the following could the technician do to help eliminate the interference ?
D. All of the above
Any of the conductive gels or sensors on the market for use with the EKG machine have what in common?
D. All of the above
What can the EKG technician do to help make the skin a better conductor of electricity?
D. all of the above
Which of the patient's limb is the ground lead:
C. right leg
The QRS complexes in lead I shows the R wave inverted or negative, what does this mean to the technician?
C. The patient's leads could be hooked up incorrectly
Which limb is positive in AVL lead?
D. Left arm
Which limb is positive in the AVR lead?
C. Right arm
Which limb is positive in the AVF lead
D. Left leg
A negative wave will be pointing in which of the following directions?
D. Downward
A positive wave will be pointing in which of the following directions?
B. Upward
A rhythm strip is which of the following?
D. All of the above
The standard leads are comprised of which of the following leads?
A) d. Both A and B
D. Both A and B
In lead one which of the following electrical impulses are recorded?
A. Right arm and left arm
In lead three which of the following electrical impulses are recorded?
B. Left arm and left leg
In lead two which of the following electrical impulses are recorded?
A. Right arm and left leg
An electrical shock synchronized with the QRS complex or ventricular beat, that depolarizes the entire heart in order to allow the SA node to resume control is known as which of the following?
C. Cardioversion
A normal T wave is what voltage?
C. 0.50-0.10 mm
When the monitor shows a straight line, you should begin troubleshooting by checking which of the following?
D. All of the above
Poor electrode contact can cause which of the following?
D. All of the above
The wave form that represents ventricular repolarization is which of the following?
D. T wave
When a rhythm strip is requested, which of the following will be done?
D. Both A and B
On an ECG the Pwave corresponds to which of the following activites?
B. Atrial depolarization
Which of the following demonstrates the direction time is measured on the ECG paper?
A. Horizontal
Which of the following demonstrates the direction voltage is measured on the ECG paper?
B. Vertical
Fifth intercostal space at junction of left midclavicular line (under the nipple usually)
D. V4
At horizontal level of position V4 at left midaxillary line
A. V5
Fourth intercostal space at right margin of sternum
C. VI
At horizontal level of position V4 at left anterior axillary line
C. V5
Fourth intercostal space at the left margin of sternum
B. V2
Midway between position V2 and V4
C. V3
Rapid heart rate commonly occurs with which of the following
D. All of the above
The precordial leads are the___________leads.
B. Chest or V leads
Good technique when hooking up a patient will do which of the following?
D. All of the above
Muscle artifact voltage sometimes are consistent or erratic in amplitude and frequency in which of the following leads?
D. All of the above
Which wave form would not be seen in a normal ECG?
C. V wave
A Sinus rhythm at a rate of 55 would be considered which of the following?
A. Sinus bradycardia
A sinus rhythm at a rate of 60-72 would be considered which of the following?
D. Sinus arrhythmia
A sinus rhythm of 100 would be considered which of the following?
C. Borderline sinus tachycardia
Artifact voltage are the result of which of the following?
D. All of the above
Leads 1, 2, and 3 are the_________leads.
A. Limb
Which switch controls how much gain or amplification the ECG will have ?
D. Sensitivity
If for any reason you find it necessary to change the sensitivity switch position, by checking the amplitude of the________________, the physician can tell what sensitivity you are using.
D. Standardization mark
The device that detects skin voltage is which of the following?
C. Sensor
Electrical interference may originate in the electrical wiring in the walls of the room. Many times interference can be eliminated or minimized by doing which of the following?
