NHA EKG CERTIFICATION REVIEW SET
2026 QUESTIONS WITH ANSWERS GRADED
A+
⫸ What is a more medically correct term for the clotting of an artery?
Answer: Occlusion
⫸ When the Atria depolarize (or contract), what is shown on the EKG
tracing? Answer: P wave
⫸ An irregular heartbeat that is common among children is called
_____ _____. Answer: Sinus Arrhythmia
⫸ 1 sm box on an EKG strip denotes 0.04 seconds of time. How long is
this represented in millimeters? Answer: 1 mm
⫸ What is the term used to described the amount of blood pumped by
the heart per minute? Answer: Cardiac output
⫸ Leads I to III are collectively known as Answer: Standard leads
⫸ Leads V1 to V6 are collectively known as Answer: Precordial leads
,⫸ What is the main artery in the arterial system Answer: Aorta
⫸ aVr, aVl, and aVf are known as Answer: Augmented leads
⫸ Leg electrodes are only used for? Answer: grounding
⫸ What is the main vein in the venous system? Answer: Superior vena
cava
⫸ The mitral valve is also known as Answer: bicuspid valve
⫸ When the ventricles depolarizes (contracts), what is shown on the
EKG tracing Answer: QRS complex
⫸ The Angle of Louis provides the LOCATION for which intercostal
space Answer: 2nd
⫸ When clotting reduces oxygen supply to a region of the heart it is
known as _____. Answer: Ischemia
⫸ When the Atria repolarize (or are at rest), what is shown on the EKG
tracing? Answer: PR segment
, ⫸ (T/F) You should stop a stress test because of a change of heart
rhythm Answer: False
⫸ What is formed by the manubrium and the body of the sternum that
helps in electrode placement Answer: Angle of Louis
⫸ V1 is placed in the 4th intercostal space and is located on which side
of the sternum Answer: Right side
⫸ The distance between P wave to P wave can be used to calculate what
kind of rate Answer: Atrial rate
⫸ Which lead should be placed just below the nipple, in the 5th
intercostal space on the midclavicular line (MCL)? Answer: V4
⫸ What arrhythmia is associated with the skipping of heartbeats on an
EKG tracing? Answer: Sinus Arrest
⫸ Which side of the sternum would you place V2 if the patient had
dextrocardia? Answer: Right
⫸ V3 should be placed halfway between which two leads? Answer: V2
and V4
⫸ The presence of an inverted or absent P wave indicates what type of
arrhythmia? Answer: Junctional Arrhythmia
2026 QUESTIONS WITH ANSWERS GRADED
A+
⫸ What is a more medically correct term for the clotting of an artery?
Answer: Occlusion
⫸ When the Atria depolarize (or contract), what is shown on the EKG
tracing? Answer: P wave
⫸ An irregular heartbeat that is common among children is called
_____ _____. Answer: Sinus Arrhythmia
⫸ 1 sm box on an EKG strip denotes 0.04 seconds of time. How long is
this represented in millimeters? Answer: 1 mm
⫸ What is the term used to described the amount of blood pumped by
the heart per minute? Answer: Cardiac output
⫸ Leads I to III are collectively known as Answer: Standard leads
⫸ Leads V1 to V6 are collectively known as Answer: Precordial leads
,⫸ What is the main artery in the arterial system Answer: Aorta
⫸ aVr, aVl, and aVf are known as Answer: Augmented leads
⫸ Leg electrodes are only used for? Answer: grounding
⫸ What is the main vein in the venous system? Answer: Superior vena
cava
⫸ The mitral valve is also known as Answer: bicuspid valve
⫸ When the ventricles depolarizes (contracts), what is shown on the
EKG tracing Answer: QRS complex
⫸ The Angle of Louis provides the LOCATION for which intercostal
space Answer: 2nd
⫸ When clotting reduces oxygen supply to a region of the heart it is
known as _____. Answer: Ischemia
⫸ When the Atria repolarize (or are at rest), what is shown on the EKG
tracing? Answer: PR segment
, ⫸ (T/F) You should stop a stress test because of a change of heart
rhythm Answer: False
⫸ What is formed by the manubrium and the body of the sternum that
helps in electrode placement Answer: Angle of Louis
⫸ V1 is placed in the 4th intercostal space and is located on which side
of the sternum Answer: Right side
⫸ The distance between P wave to P wave can be used to calculate what
kind of rate Answer: Atrial rate
⫸ Which lead should be placed just below the nipple, in the 5th
intercostal space on the midclavicular line (MCL)? Answer: V4
⫸ What arrhythmia is associated with the skipping of heartbeats on an
EKG tracing? Answer: Sinus Arrest
⫸ Which side of the sternum would you place V2 if the patient had
dextrocardia? Answer: Right
⫸ V3 should be placed halfway between which two leads? Answer: V2
and V4
⫸ The presence of an inverted or absent P wave indicates what type of
arrhythmia? Answer: Junctional Arrhythmia
