EDIUG YDUTS · AMCC
★ + ★
National Healthcareer Association
NHA Certified Clinical Medical Assistant (CCMA)
EST. 1989
E M P O W E R I N G P E O P L E . A D V A N C I N G H E A LT H C A R E .
NHA CCMA — Comprehensive Study Guide
E KG , P H L E B OTO M Y & A DVA N C E D C L I N I C A L K N O W L E D G E
INSTITUTION National Healthcareer Association EXAM CODE CCMA
(NHA)
CREDENTIAL Certified Clinical Medical Assistant ACADEMIC YEAR
STUDY GUIDE Comprehensive Examination TOTAL QUESTIONS 50 Questions
Preparation
SUBJECT Clinical Medical Assisting FORMAT Multiple Choice — Select the
Single Best Answer
STUDY GUIDE INSTRUCTIONS
▸ Select the single best answer for each question.
▸ This section covers EKG interpretation, phlebotomy technique, stress testing, cardiac markers, and
clinical patient care.
▸ Correct answers and detailed rationales appear below each question.
, EKG, PHLEBOTOMY & ADVANCED CLINICAL KNOWLEDGE Questions 1 – 50
1. In EKG lead placement, which limb is always the ground?
A. Left arm
B. Left leg
C. Right arm
D. Right leg
CORRECT ANSWER D — Right leg
RATIONALE The right leg is always the ground (reference) electrode in standard EKG lead
placement. The left arm, right arm, and left leg are the active electrodes used for
the limb leads (I, II, III) and augmented leads (aVR, aVL, aVF). The right leg
electrode reduces electrical interference.
2. A waveform on an EKG refers to:
A. A line between two waveforms
B. Movement away from the isoelectric line either positive or negative
C. A waveform plus a segment
D. Several waveforms together
CORRECT ANSWER B — Movement away from the isoelectric line either positive or negative
RATIONALE A waveform refers to movement away from the isoelectric line either upward
(positive deflection) or downward (negative deflection). A segment is a line
between two waveforms. An interval is a waveform plus a segment. A complex is
several waveforms together.
, 3. An interval on an EKG is defined as:
A. Movement away from the isoelectric line
B. A line between two waveforms
C. A waveform plus a segment
D. A single point on the EKG tracing
CORRECT ANSWER C — A waveform plus a segment
RATIONALE An interval is defined as a waveform plus a segment. For example, the PR interval
consists of the P wave plus the PR segment. The QT interval consists of the QRS
complex, ST segment, and T wave combined. Intervals provide critical
information about conduction timing.
4. A complex on an EKG is defined as:
A. A single waveform
B. A line connecting two points
C. Several waveforms
D. The space between two cardiac cycles
CORRECT ANSWER C — Several waveforms
RATIONALE A complex refers to several waveforms appearing together. The QRS complex is
the prime example — it consists of the Q wave, R wave, and S wave. Not all three
waves are always present; the complex is still called the QRS complex regardless
of which specific waves appear.
★ + ★
National Healthcareer Association
NHA Certified Clinical Medical Assistant (CCMA)
EST. 1989
E M P O W E R I N G P E O P L E . A D V A N C I N G H E A LT H C A R E .
NHA CCMA — Comprehensive Study Guide
E KG , P H L E B OTO M Y & A DVA N C E D C L I N I C A L K N O W L E D G E
INSTITUTION National Healthcareer Association EXAM CODE CCMA
(NHA)
CREDENTIAL Certified Clinical Medical Assistant ACADEMIC YEAR
STUDY GUIDE Comprehensive Examination TOTAL QUESTIONS 50 Questions
Preparation
SUBJECT Clinical Medical Assisting FORMAT Multiple Choice — Select the
Single Best Answer
STUDY GUIDE INSTRUCTIONS
▸ Select the single best answer for each question.
▸ This section covers EKG interpretation, phlebotomy technique, stress testing, cardiac markers, and
clinical patient care.
▸ Correct answers and detailed rationales appear below each question.
, EKG, PHLEBOTOMY & ADVANCED CLINICAL KNOWLEDGE Questions 1 – 50
1. In EKG lead placement, which limb is always the ground?
A. Left arm
B. Left leg
C. Right arm
D. Right leg
CORRECT ANSWER D — Right leg
RATIONALE The right leg is always the ground (reference) electrode in standard EKG lead
placement. The left arm, right arm, and left leg are the active electrodes used for
the limb leads (I, II, III) and augmented leads (aVR, aVL, aVF). The right leg
electrode reduces electrical interference.
2. A waveform on an EKG refers to:
A. A line between two waveforms
B. Movement away from the isoelectric line either positive or negative
C. A waveform plus a segment
D. Several waveforms together
CORRECT ANSWER B — Movement away from the isoelectric line either positive or negative
RATIONALE A waveform refers to movement away from the isoelectric line either upward
(positive deflection) or downward (negative deflection). A segment is a line
between two waveforms. An interval is a waveform plus a segment. A complex is
several waveforms together.
, 3. An interval on an EKG is defined as:
A. Movement away from the isoelectric line
B. A line between two waveforms
C. A waveform plus a segment
D. A single point on the EKG tracing
CORRECT ANSWER C — A waveform plus a segment
RATIONALE An interval is defined as a waveform plus a segment. For example, the PR interval
consists of the P wave plus the PR segment. The QT interval consists of the QRS
complex, ST segment, and T wave combined. Intervals provide critical
information about conduction timing.
4. A complex on an EKG is defined as:
A. A single waveform
B. A line connecting two points
C. Several waveforms
D. The space between two cardiac cycles
CORRECT ANSWER C — Several waveforms
RATIONALE A complex refers to several waveforms appearing together. The QRS complex is
the prime example — it consists of the Q wave, R wave, and S wave. Not all three
waves are always present; the complex is still called the QRS complex regardless
of which specific waves appear.
