CHAPTER 49 ELECTROCARDIOGRAPHY EXAM WITH
COMPLETE SOLUTIONS
coronary artery disease (CAD) is the leading cause of death among men and women in
the United States - ANSWER true, cad
ECG represents the heart's electrical activity and mechanical performance - ANSWER
false, only electrical activity
ECG represents only the heart's - ANSWER electrical activity
Another abbreviation for ECG is - ANSWER EKG
Movement away from the baseline is called a deflection or - ANSWER wave
The waves or deflections that go up (positive) or down (negative) from the baseline
represent - ANSWER amplitude or voltage
When myocardial cells is in resting place, it is called - ANSWER repolarization
One cycle of repolarization and one cycle of depolarization represents - ANSWER 1
heartbeat
As the cell_______, the atria and ventricles contract - ANSWER depolarize
When a myocardial cell is polarized, it has - ANSWER Negative internal charge and
positive external charge
On an ECG, _______ represents time - ANSWER horizontal axis (line)
When the heart skips a beat, there is a ________between PQRST - ANSWER long flat line
Completion of ventricular contraction where the cells begin their resting phase before
the process restarts - ANSWER T wave
Normal heart rate, that is neither fast or slow is - ANSWER 60-100 bpm
____wave represents the atrial contraction that is first initiated by an electrical impulse
from the SA Node - ANSWER P wave
Represents ventricular depolarization - ANSWER QRS Complex
Recording are made from a variety of perspectives or angles known as - ANSWER leads
The P-R interval is between - ANSWER 0.12 and 0.20 seconds
The QRS complex and the T wave typically point in the same direction, and T waves that
are opposite in the direction from QRS may indicate a problem in the heart or its
, electrical system - ANSWER true, QRS
Heart rate is expressed as beats per seconds - ANSWER false, it's per minute
bradycardia is _____ than normal heart rate - ANSWER slower
To obtain an estimated heart rate of either the ventricular or the atrial contractions, use
the 10 second method - ANSWER False, six- second method
An exact calculation of ventricular heart rate is achieved by counting the mm boxes
between two P waves and
by _______ into 1500. - ANSWER dividing the number
Ventricular rhythm is determined by measuring the distance between QRS complexes -
ANSWER true, VR
Many types of ECG machines are in use, but all should be calibrated to align with the
international standard - ANSWER true, ecg
The ECG paper in all machines moves at the same speed of - ANSWER 25 mm/second
Standardization is a means of verifying that each machine deflects____ in response to 1
mV (millivolt) of electricity in sensitivity - ANSWER 10 mm
Older adults also have ______ - ANSWER fragile skin
A multichannel ECG records all_____ simultaneously - ANSWER 12 leads
Many computerized models can record from more than one lead at once, which saves
time and effort - ANSWER true, computerized models
Computerized Electrocardiographs should not be not be monitored for artifacts -
ANSWER false, they have to be monitored
A ECG control panel includes the following : record switch, sensitivity control and stylus
control EXCEPT - ANSWER back lead
______ also called precordial leads record from various positions on the thorax -
ANSWER chest leads
"Time" markers , referred to as _______, are printed on all ECG paper - ANSWER three-
COMPLETE SOLUTIONS
coronary artery disease (CAD) is the leading cause of death among men and women in
the United States - ANSWER true, cad
ECG represents the heart's electrical activity and mechanical performance - ANSWER
false, only electrical activity
ECG represents only the heart's - ANSWER electrical activity
Another abbreviation for ECG is - ANSWER EKG
Movement away from the baseline is called a deflection or - ANSWER wave
The waves or deflections that go up (positive) or down (negative) from the baseline
represent - ANSWER amplitude or voltage
When myocardial cells is in resting place, it is called - ANSWER repolarization
One cycle of repolarization and one cycle of depolarization represents - ANSWER 1
heartbeat
As the cell_______, the atria and ventricles contract - ANSWER depolarize
When a myocardial cell is polarized, it has - ANSWER Negative internal charge and
positive external charge
On an ECG, _______ represents time - ANSWER horizontal axis (line)
When the heart skips a beat, there is a ________between PQRST - ANSWER long flat line
Completion of ventricular contraction where the cells begin their resting phase before
the process restarts - ANSWER T wave
Normal heart rate, that is neither fast or slow is - ANSWER 60-100 bpm
____wave represents the atrial contraction that is first initiated by an electrical impulse
from the SA Node - ANSWER P wave
Represents ventricular depolarization - ANSWER QRS Complex
Recording are made from a variety of perspectives or angles known as - ANSWER leads
The P-R interval is between - ANSWER 0.12 and 0.20 seconds
The QRS complex and the T wave typically point in the same direction, and T waves that
are opposite in the direction from QRS may indicate a problem in the heart or its
, electrical system - ANSWER true, QRS
Heart rate is expressed as beats per seconds - ANSWER false, it's per minute
bradycardia is _____ than normal heart rate - ANSWER slower
To obtain an estimated heart rate of either the ventricular or the atrial contractions, use
the 10 second method - ANSWER False, six- second method
An exact calculation of ventricular heart rate is achieved by counting the mm boxes
between two P waves and
by _______ into 1500. - ANSWER dividing the number
Ventricular rhythm is determined by measuring the distance between QRS complexes -
ANSWER true, VR
Many types of ECG machines are in use, but all should be calibrated to align with the
international standard - ANSWER true, ecg
The ECG paper in all machines moves at the same speed of - ANSWER 25 mm/second
Standardization is a means of verifying that each machine deflects____ in response to 1
mV (millivolt) of electricity in sensitivity - ANSWER 10 mm
Older adults also have ______ - ANSWER fragile skin
A multichannel ECG records all_____ simultaneously - ANSWER 12 leads
Many computerized models can record from more than one lead at once, which saves
time and effort - ANSWER true, computerized models
Computerized Electrocardiographs should not be not be monitored for artifacts -
ANSWER false, they have to be monitored
A ECG control panel includes the following : record switch, sensitivity control and stylus
control EXCEPT - ANSWER back lead
______ also called precordial leads record from various positions on the thorax -
ANSWER chest leads
"Time" markers , referred to as _______, are printed on all ECG paper - ANSWER three-
