NHA EKG PRACTICE EXAM (3 PRACTICE EXAM)
CONTAINS 300 REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
alternating current (AC) interference - ANSWER: 60-cycle interference; an artifact in
the EKG tracing caused by electrical interference
ambulatory monitoring - ANSWER: Often referred to as Holter monitoring; an EKG
conducted over a period of time while the patient resumes normal activities
amplitude - ANSWER: also known as gain is the degree of change; in an EKG tracing,
it is represented by the vertical axis
arrhythmia - ANSWER: also knowns as dysrhythmia; a change from a normal EKG
rhythm
artifact - ANSWER: unwanted external event occurring in an EKG tracing not
associated with the heart function
atrioventricular - ANSWER: The secondary pacemaker located at the junction of the
atria and ventricles
augmented - ANSWER: a unipolar recording that requires assisting in magnifying the
tracing by drawing from other poles
bipolar - ANSWER: recording of electrical current involving both a positive and
negative pole
bundle of His - ANSWER: A collection of fibers that conduct the electrical impulses
from the AV node to the ventricular septum
depolarization - ANSWER: asystole; contraction
electrocardiogram (EKG) - ANSWER: a record of the heart's electrical impulses
electrocardiograph - ANSWER: the machine that records an electrocardiogram
electrocardiography - ANSWER: the process of recording an electrocardiogram
interrupted baseline - ANSWER: a break in the tracing usually caused by a
disconnected or broken lead
negative deflection - ANSWER: a downward curvature of waves in an EKG tracing
, P wave - ANSWER: the first wave in the cardiac cycle representing atria
depolarization
positive deflection - ANSWER: an upward curvature of waves in an EKG tracing
PR interval - ANSWER: the length of time from the beginning of atrial depolarization
to the beginning of ventricular depolarization
precordial - ANSWER: located in the chest in front of the heart
Purkinje fibers - ANSWER: the fingerlike projections that spread through the
ventirulcar muscle and initiate ventricular contraction
QRS wave - ANSWER: also known as QRS complex; the second wave in the cardiac
cycle representing ventricular depolarization
QT interval - ANSWER: the length of time from the beginning of the ventricular
depolarization to ventricular depolarization
Repolarization - ANSWER: systole; relaxation
sinoatrial (SA) node - ANSWER: the natural pacemaker of the heart located in the
upper right atrium
Somatic tremor - ANSWER: muscle movement causing irregular spike in an EKG
tracing
Standardization - ANSWER: the universally acceptable speed of the tracing and gain
(height) used for accurate interpretation of the tracing
T wave - ANSWER: the third wave in the cardiac cycle representing ventricular
repolarization
Unipolar - ANSWER: recording from one location or one pole
wandering baseline - ANSWER: Inconsistency in the baseline location on the EKG
tracing likely caused by poor lead contact or skin applications
How do you prep a patient for an EKG? - ANSWER: have the patient disprove,
provide dropping, remove jewelry, clean skin with alcohol wires or soap, clip or she
hair
What does lead I record? - ANSWER: Impulses between the left and right arms
What does lead II record? - ANSWER: Impulses between the right arm and left leg
What does lead III record? - ANSWER: impulse between the left arm and left leg
CONTAINS 300 REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
alternating current (AC) interference - ANSWER: 60-cycle interference; an artifact in
the EKG tracing caused by electrical interference
ambulatory monitoring - ANSWER: Often referred to as Holter monitoring; an EKG
conducted over a period of time while the patient resumes normal activities
amplitude - ANSWER: also known as gain is the degree of change; in an EKG tracing,
it is represented by the vertical axis
arrhythmia - ANSWER: also knowns as dysrhythmia; a change from a normal EKG
rhythm
artifact - ANSWER: unwanted external event occurring in an EKG tracing not
associated with the heart function
atrioventricular - ANSWER: The secondary pacemaker located at the junction of the
atria and ventricles
augmented - ANSWER: a unipolar recording that requires assisting in magnifying the
tracing by drawing from other poles
bipolar - ANSWER: recording of electrical current involving both a positive and
negative pole
bundle of His - ANSWER: A collection of fibers that conduct the electrical impulses
from the AV node to the ventricular septum
depolarization - ANSWER: asystole; contraction
electrocardiogram (EKG) - ANSWER: a record of the heart's electrical impulses
electrocardiograph - ANSWER: the machine that records an electrocardiogram
electrocardiography - ANSWER: the process of recording an electrocardiogram
interrupted baseline - ANSWER: a break in the tracing usually caused by a
disconnected or broken lead
negative deflection - ANSWER: a downward curvature of waves in an EKG tracing
, P wave - ANSWER: the first wave in the cardiac cycle representing atria
depolarization
positive deflection - ANSWER: an upward curvature of waves in an EKG tracing
PR interval - ANSWER: the length of time from the beginning of atrial depolarization
to the beginning of ventricular depolarization
precordial - ANSWER: located in the chest in front of the heart
Purkinje fibers - ANSWER: the fingerlike projections that spread through the
ventirulcar muscle and initiate ventricular contraction
QRS wave - ANSWER: also known as QRS complex; the second wave in the cardiac
cycle representing ventricular depolarization
QT interval - ANSWER: the length of time from the beginning of the ventricular
depolarization to ventricular depolarization
Repolarization - ANSWER: systole; relaxation
sinoatrial (SA) node - ANSWER: the natural pacemaker of the heart located in the
upper right atrium
Somatic tremor - ANSWER: muscle movement causing irregular spike in an EKG
tracing
Standardization - ANSWER: the universally acceptable speed of the tracing and gain
(height) used for accurate interpretation of the tracing
T wave - ANSWER: the third wave in the cardiac cycle representing ventricular
repolarization
Unipolar - ANSWER: recording from one location or one pole
wandering baseline - ANSWER: Inconsistency in the baseline location on the EKG
tracing likely caused by poor lead contact or skin applications
How do you prep a patient for an EKG? - ANSWER: have the patient disprove,
provide dropping, remove jewelry, clean skin with alcohol wires or soap, clip or she
hair
What does lead I record? - ANSWER: Impulses between the left and right arms
What does lead II record? - ANSWER: Impulses between the right arm and left leg
What does lead III record? - ANSWER: impulse between the left arm and left leg
