MEDCA EKG Study Guide Questions
with Correct Answers
The arteries that branch off from the aorta and feed oxygen-rich blood to the heart
muscle are the - Answer-coronary arteries
Patient psychology can be more important in obtaining a diagnostically pure EKG than
the mechanics of administering the EKG - Answer-TRUE
EKG can be used to evaluate the function of the artificial pacemakers - Answer-TRUE
Muscular wall that separates the heart into a right and left side - Answer-septum
______ regulate the flow of blood into and out of the proper chambers - Answer-valves
is the color code for the lead wire to the right leg - Answer-GREEN
The blood exchanges carbon dioxide (CO2) for oxygen in the - Answer-lungs
ATP (adenosine triphosphate) is a substance that causes the muscle of the heart to -
Answer-contract momentarily
The electrocardiograph can be used to determine blood pressure - Answer-FALSE
The time normally required for one cardiac impulse & recharging of cells is - Answer-0.5
seconds
The EKG records the actual image of the heart - Answer-FALSE
The right leg electrode is called the ground, _______ electrode - Answer-reference
The three limb leads that form a triangle are called - Answer-Einthoven's triangle
Lead 1,2,3 are electrically ________ from the heart electrical activity - Answer-
equidistant
The negative pole is always on the - Answer-right leg
The __________ electrode is positive in lead 1 and negative in lead 3 - Answer-left arm
, Lead 1 records difference in electrical potential between the left arm & - Answer-the
right arm
Lead 2 records difference in electrical potential between the left leg & the - Answer-right
arm
The 3 additional leads that record frontal place activity are called - Answer-augmented
leads
Augmented leads are designated by a VR, a VL and a VF, "aV" stands for - Answer-
augmented voltage
The chest leads are numbered V1 to V6 and move in successive steps from patient's -
Answer-right to left
The function of the ____________ is to record the 3rd dimension of the heart, from front
to rear - Answer-chest leads
The EKG is a recording of the electrical impluses associated with cardiac contraction
and - Answer-relaxation
The EKG is a method of recording the heart's strength - Answer-FALSE
The EKG records the amount of voltage generated by the heart and the _____ required
for that voltage to travel - Answer-time
Polarized activity simply refers to the heart - Answer-resting
The activity of the heart during the impluses that causes contraction, but not the
contraction itself, is known as - Answer-depolarization
The electrical recovery of the heart as the cells recharge themselves is known as -
Answer-repolarization
The P wave represents ______ depolarization - Answer-atrial
The average heart ___________ times every day - Answer-beats 100,000
The average heart ____________ times every day - Answer-pumps 2,000
The human heart weighs approximately - Answer-11 ounces
The human heart is about the size of a - Answer-clenched fist
The heart is made up of specialized muscle tissue called - Answer-myocardium
with Correct Answers
The arteries that branch off from the aorta and feed oxygen-rich blood to the heart
muscle are the - Answer-coronary arteries
Patient psychology can be more important in obtaining a diagnostically pure EKG than
the mechanics of administering the EKG - Answer-TRUE
EKG can be used to evaluate the function of the artificial pacemakers - Answer-TRUE
Muscular wall that separates the heart into a right and left side - Answer-septum
______ regulate the flow of blood into and out of the proper chambers - Answer-valves
is the color code for the lead wire to the right leg - Answer-GREEN
The blood exchanges carbon dioxide (CO2) for oxygen in the - Answer-lungs
ATP (adenosine triphosphate) is a substance that causes the muscle of the heart to -
Answer-contract momentarily
The electrocardiograph can be used to determine blood pressure - Answer-FALSE
The time normally required for one cardiac impulse & recharging of cells is - Answer-0.5
seconds
The EKG records the actual image of the heart - Answer-FALSE
The right leg electrode is called the ground, _______ electrode - Answer-reference
The three limb leads that form a triangle are called - Answer-Einthoven's triangle
Lead 1,2,3 are electrically ________ from the heart electrical activity - Answer-
equidistant
The negative pole is always on the - Answer-right leg
The __________ electrode is positive in lead 1 and negative in lead 3 - Answer-left arm
, Lead 1 records difference in electrical potential between the left arm & - Answer-the
right arm
Lead 2 records difference in electrical potential between the left leg & the - Answer-right
arm
The 3 additional leads that record frontal place activity are called - Answer-augmented
leads
Augmented leads are designated by a VR, a VL and a VF, "aV" stands for - Answer-
augmented voltage
The chest leads are numbered V1 to V6 and move in successive steps from patient's -
Answer-right to left
The function of the ____________ is to record the 3rd dimension of the heart, from front
to rear - Answer-chest leads
The EKG is a recording of the electrical impluses associated with cardiac contraction
and - Answer-relaxation
The EKG is a method of recording the heart's strength - Answer-FALSE
The EKG records the amount of voltage generated by the heart and the _____ required
for that voltage to travel - Answer-time
Polarized activity simply refers to the heart - Answer-resting
The activity of the heart during the impluses that causes contraction, but not the
contraction itself, is known as - Answer-depolarization
The electrical recovery of the heart as the cells recharge themselves is known as -
Answer-repolarization
The P wave represents ______ depolarization - Answer-atrial
The average heart ___________ times every day - Answer-beats 100,000
The average heart ____________ times every day - Answer-pumps 2,000
The human heart weighs approximately - Answer-11 ounces
The human heart is about the size of a - Answer-clenched fist
The heart is made up of specialized muscle tissue called - Answer-myocardium
