NHA CCMA Exam Questions and
Answers 2026 | Certified Clinical
Medical Assistant Study Guide |
sympathetic nervous system - <<<<CORRECT ANSWERS>>>affect both the atria and
ventricles by increasing the heart rate
parasympathetic nervous system - <<<<CORRECT ANSWERS>>>affects only the atria
by decreasing the heart rate
automaticity - <<<<CORRECT ANSWERS>>>the ability of the cardiac pacemaker cells
to spontaneously initiate their own electrical impulse without being stimulated from
another source
excitability - <<<<CORRECT ANSWERS>>>the ability to respond to external stimulus:
chemical,electrical, and mechanical
conductivity - <<<<CORRECT ANSWERS>>>the ability of all cardiac cells to receive an
electrical stimulus and transmit the stimulus to other cardiac cells
Contractility - <<<<CORRECT ANSWERS>>>the ability of the cardiac cells to shorten
and cause cardiac muscle contraction in response to an electrical stimulus
Depolarization - <<<<CORRECT ANSWERS>>>positive - contracting
repolarization - <<<<CORRECT ANSWERS>>>negative - relaxation
SA Node - <<<<CORRECT ANSWERS>>>primary pacemaker of the heart and has a
normal firing rate of 60-100 bpm
LEAD I - <<<<CORRECT ANSWERS>>>Left Arm is positive
Right Arm is negative
LEAD II - <<<<CORRECT ANSWERS>>>Left Leg is Positive
Right Arm is negative
LEAD III - <<<<CORRECT ANSWERS>>>Left Leg is positive
Left Arm is negative
Lead aVR - <<<<CORRECT ANSWERS>>>Right arm is positive and the other limbs
are negative
, Lead aVL - <<<<CORRECT ANSWERS>>>Left arm is positive and the other limbs are
negative
Lead aVF - <<<<CORRECT ANSWERS>>>Left leg/foot is positive and the other limbs
are negative
V1 - <<<<CORRECT ANSWERS>>>4th intercostal space, right sternal border
V2 - <<<<CORRECT ANSWERS>>>4th intercostal space, left sternal border
V3 - <<<<CORRECT ANSWERS>>>between v2 and v4
V4 - <<<<CORRECT ANSWERS>>>5th intercostal space, left midclavicular line
V5 - <<<<CORRECT ANSWERS>>>5th intercostal space, anterior axillary line
V6 - <<<<CORRECT ANSWERS>>>5th intercostal space, midaxillary line
horizontal axis - <<<<CORRECT ANSWERS>>>represents time: 1mm
vertical axis - <<<<CORRECT ANSWERS>>>measured in millivolts
running speed - <<<<CORRECT ANSWERS>>>25mm/sec
waveform - <<<<CORRECT ANSWERS>>>refers to movement away from the
isoelectric line
segment - <<<<CORRECT ANSWERS>>>line between two waveforms
interval - <<<<CORRECT ANSWERS>>>waveform plus a segment
complex - <<<<CORRECT ANSWERS>>>several waveforms
P WAVE - <<<<CORRECT ANSWERS>>>deflection produced by atrial depolarization
QRS COMPLEX - <<<<CORRECT ANSWERS>>>represents ventricular depolarization
(activation)
Q WAVE - <<<<CORRECT ANSWERS>>>initial negative deflection
R WAVE - <<<<CORRECT ANSWERS>>>first positive deflection
S WAVE - <<<<CORRECT ANSWERS>>>first negative deflection
T WAVE - <<<<CORRECT ANSWERS>>>deflection produced by ventricular
repolarizations
Answers 2026 | Certified Clinical
Medical Assistant Study Guide |
sympathetic nervous system - <<<<CORRECT ANSWERS>>>affect both the atria and
ventricles by increasing the heart rate
parasympathetic nervous system - <<<<CORRECT ANSWERS>>>affects only the atria
by decreasing the heart rate
automaticity - <<<<CORRECT ANSWERS>>>the ability of the cardiac pacemaker cells
to spontaneously initiate their own electrical impulse without being stimulated from
another source
excitability - <<<<CORRECT ANSWERS>>>the ability to respond to external stimulus:
chemical,electrical, and mechanical
conductivity - <<<<CORRECT ANSWERS>>>the ability of all cardiac cells to receive an
electrical stimulus and transmit the stimulus to other cardiac cells
Contractility - <<<<CORRECT ANSWERS>>>the ability of the cardiac cells to shorten
and cause cardiac muscle contraction in response to an electrical stimulus
Depolarization - <<<<CORRECT ANSWERS>>>positive - contracting
repolarization - <<<<CORRECT ANSWERS>>>negative - relaxation
SA Node - <<<<CORRECT ANSWERS>>>primary pacemaker of the heart and has a
normal firing rate of 60-100 bpm
LEAD I - <<<<CORRECT ANSWERS>>>Left Arm is positive
Right Arm is negative
LEAD II - <<<<CORRECT ANSWERS>>>Left Leg is Positive
Right Arm is negative
LEAD III - <<<<CORRECT ANSWERS>>>Left Leg is positive
Left Arm is negative
Lead aVR - <<<<CORRECT ANSWERS>>>Right arm is positive and the other limbs
are negative
, Lead aVL - <<<<CORRECT ANSWERS>>>Left arm is positive and the other limbs are
negative
Lead aVF - <<<<CORRECT ANSWERS>>>Left leg/foot is positive and the other limbs
are negative
V1 - <<<<CORRECT ANSWERS>>>4th intercostal space, right sternal border
V2 - <<<<CORRECT ANSWERS>>>4th intercostal space, left sternal border
V3 - <<<<CORRECT ANSWERS>>>between v2 and v4
V4 - <<<<CORRECT ANSWERS>>>5th intercostal space, left midclavicular line
V5 - <<<<CORRECT ANSWERS>>>5th intercostal space, anterior axillary line
V6 - <<<<CORRECT ANSWERS>>>5th intercostal space, midaxillary line
horizontal axis - <<<<CORRECT ANSWERS>>>represents time: 1mm
vertical axis - <<<<CORRECT ANSWERS>>>measured in millivolts
running speed - <<<<CORRECT ANSWERS>>>25mm/sec
waveform - <<<<CORRECT ANSWERS>>>refers to movement away from the
isoelectric line
segment - <<<<CORRECT ANSWERS>>>line between two waveforms
interval - <<<<CORRECT ANSWERS>>>waveform plus a segment
complex - <<<<CORRECT ANSWERS>>>several waveforms
P WAVE - <<<<CORRECT ANSWERS>>>deflection produced by atrial depolarization
QRS COMPLEX - <<<<CORRECT ANSWERS>>>represents ventricular depolarization
(activation)
Q WAVE - <<<<CORRECT ANSWERS>>>initial negative deflection
R WAVE - <<<<CORRECT ANSWERS>>>first positive deflection
S WAVE - <<<<CORRECT ANSWERS>>>first negative deflection
T WAVE - <<<<CORRECT ANSWERS>>>deflection produced by ventricular
repolarizations
