EKG (NCMA) Exam 2025 Questions and
Answers
V1 - ANSWER✔✔-Fourth intercostal space, right sternal border
V2 - ANSWER✔✔-Fourth intercostal space, left sternal border
V3 - ANSWER✔✔-Midway between V2 and V4
V4 - ANSWER✔✔-Fifth intercostal space, left midclavicular line.
V5 - ANSWER✔✔-Left of the anterior axillary fold, in line with V4
V6 - ANSWER✔✔-left of the midaxillary, in line with V4 and V5
Which of the following are appropriate actions for the ECG technician to take when placing
electrodes on a patient's skin for a 24-hour Holter monitor? (Select the three (3) correct answers.) -
ANSWER✔✔-A Holter monitor is used to monitor a patient's heart during normal activity (for a
period of 24-48 hours or up to 30 days). It is a small monitor that can be carried in a pouch or
strapped to the waist or shoulder. The electrodes should be placed so they will stay in place for the
duration of the monitoring.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, Avoid scars and incisions when selecting where to place electrodes. Electrodes and lead wires should
be secured to the patient. Abrading the skin with a dry 4x4 is one approach to preparing the skin.
Lead wires can be placed facing any direction.
What is the approximate amount of time for the QRS complex to record on an ECG? -
ANSWER✔✔-0.06-0.10 seconds
The QRS complex should be recorded for 0.06-0.10 seconds when running an ECG.
(greater than 0.12 is considered abnormal and you would need to consider a bundle branch block),
The PR interval normal range is - ANSWER✔✔-0.12-0.20 seconds,
.
The ECG technician is performing an ECG on a patient who is obese, and wandering baseline is
present. Which of the actions should the technician take? (Select the two (2) correct answers.) -
ANSWER✔✔-In this scenario, it is important to make sure good skin preparation and new
electrodes and clean clips are used.
A patient with Parkinson's comes in for an ECG with noticeably severe tremors. Which of the
following should the medical assistant do to ensure a proper reading? - ANSWER✔✔-Have the
patient slide their hands under their buttocks.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
Answers
V1 - ANSWER✔✔-Fourth intercostal space, right sternal border
V2 - ANSWER✔✔-Fourth intercostal space, left sternal border
V3 - ANSWER✔✔-Midway between V2 and V4
V4 - ANSWER✔✔-Fifth intercostal space, left midclavicular line.
V5 - ANSWER✔✔-Left of the anterior axillary fold, in line with V4
V6 - ANSWER✔✔-left of the midaxillary, in line with V4 and V5
Which of the following are appropriate actions for the ECG technician to take when placing
electrodes on a patient's skin for a 24-hour Holter monitor? (Select the three (3) correct answers.) -
ANSWER✔✔-A Holter monitor is used to monitor a patient's heart during normal activity (for a
period of 24-48 hours or up to 30 days). It is a small monitor that can be carried in a pouch or
strapped to the waist or shoulder. The electrodes should be placed so they will stay in place for the
duration of the monitoring.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, Avoid scars and incisions when selecting where to place electrodes. Electrodes and lead wires should
be secured to the patient. Abrading the skin with a dry 4x4 is one approach to preparing the skin.
Lead wires can be placed facing any direction.
What is the approximate amount of time for the QRS complex to record on an ECG? -
ANSWER✔✔-0.06-0.10 seconds
The QRS complex should be recorded for 0.06-0.10 seconds when running an ECG.
(greater than 0.12 is considered abnormal and you would need to consider a bundle branch block),
The PR interval normal range is - ANSWER✔✔-0.12-0.20 seconds,
.
The ECG technician is performing an ECG on a patient who is obese, and wandering baseline is
present. Which of the actions should the technician take? (Select the two (2) correct answers.) -
ANSWER✔✔-In this scenario, it is important to make sure good skin preparation and new
electrodes and clean clips are used.
A patient with Parkinson's comes in for an ECG with noticeably severe tremors. Which of the
following should the medical assistant do to ensure a proper reading? - ANSWER✔✔-Have the
patient slide their hands under their buttocks.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
