EKG NHA Exam Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which lead views the septal wall?
✔✔Leads V1 and V2
How should electrodes be placed on a patient with excessive hair?
✔✔Shave small areas if necessary and clean skin with alcohol
What is artifact in an EKG?
✔✔Distortion or interference on the tracing not related to heart activity
What does a PVC occurring every other beat indicate?
✔✔Bigeminy
What is a 12-lead EKG primarily used for?
✔✔To assess the electrical activity of the heart from multiple angles
1
,How often should EKG machines undergo calibration?
✔✔Regularly, according to manufacturer guidelines, usually at least annually
What is the first step before starting an EKG?
✔✔Verify patient identity and explain the procedure
How long should a patient remain still during EKG recording?
✔✔Until the tracing is complete and free of artifacts
Why is proper skin preparation important before placing electrodes?
✔✔To reduce resistance and improve signal quality
Which EKG change may indicate hyperkalemia?
✔✔Tall, peaked T waves
Which EKG finding may suggest hypokalemia?
✔✔Flattened T waves and prominent U waves
2
,Which condition may cause ST-segment depression?
✔✔Myocardial ischemia
What does the P wave on an EKG represent?
✔✔Atrial depolarization
What does the QRS complex indicate?
✔✔Ventricular depolarization
What does the T wave represent on an EKG?
✔✔Ventricular repolarization
Which lead placement is used for the right arm in a standard 12-lead EKG?
✔✔RA electrode on the right forearm or upper arm
Which lead placement is used for the left leg in a standard 12-lead EKG?
✔✔LL electrode on the left ankle or lower leg
3
, What is the purpose of the V1 chest lead?
✔✔To view electrical activity from the fourth intercostal space at the right sternal border
Which lead is placed at the fourth intercostal space at the left sternal border?
✔✔V2
What is the correct placement for the V4 chest lead?
✔✔Fifth intercostal space at the midclavicular line
Which lead placement is at the fifth intercostal space at the anterior axillary line?
✔✔V5
Which lead is placed at the fifth intercostal space at the midaxillary line?
✔✔V6
What is the standard paper speed for an EKG?
✔✔25 mm/sec
4
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which lead views the septal wall?
✔✔Leads V1 and V2
How should electrodes be placed on a patient with excessive hair?
✔✔Shave small areas if necessary and clean skin with alcohol
What is artifact in an EKG?
✔✔Distortion or interference on the tracing not related to heart activity
What does a PVC occurring every other beat indicate?
✔✔Bigeminy
What is a 12-lead EKG primarily used for?
✔✔To assess the electrical activity of the heart from multiple angles
1
,How often should EKG machines undergo calibration?
✔✔Regularly, according to manufacturer guidelines, usually at least annually
What is the first step before starting an EKG?
✔✔Verify patient identity and explain the procedure
How long should a patient remain still during EKG recording?
✔✔Until the tracing is complete and free of artifacts
Why is proper skin preparation important before placing electrodes?
✔✔To reduce resistance and improve signal quality
Which EKG change may indicate hyperkalemia?
✔✔Tall, peaked T waves
Which EKG finding may suggest hypokalemia?
✔✔Flattened T waves and prominent U waves
2
,Which condition may cause ST-segment depression?
✔✔Myocardial ischemia
What does the P wave on an EKG represent?
✔✔Atrial depolarization
What does the QRS complex indicate?
✔✔Ventricular depolarization
What does the T wave represent on an EKG?
✔✔Ventricular repolarization
Which lead placement is used for the right arm in a standard 12-lead EKG?
✔✔RA electrode on the right forearm or upper arm
Which lead placement is used for the left leg in a standard 12-lead EKG?
✔✔LL electrode on the left ankle or lower leg
3
, What is the purpose of the V1 chest lead?
✔✔To view electrical activity from the fourth intercostal space at the right sternal border
Which lead is placed at the fourth intercostal space at the left sternal border?
✔✔V2
What is the correct placement for the V4 chest lead?
✔✔Fifth intercostal space at the midclavicular line
Which lead placement is at the fifth intercostal space at the anterior axillary line?
✔✔V5
Which lead is placed at the fifth intercostal space at the midaxillary line?
✔✔V6
What is the standard paper speed for an EKG?
✔✔25 mm/sec
4
