EKG certification Certification FREE EKG Certification General Question and Answers 2 — Questions and Answers
Question 1: Which lead is best for continuous cardiac monitoring in most clinical settings?
- Lead I
- Lead II (Correct answer)
- Lead III
- Lead aVR
Correct answer: Lead II
Lead II provides the best view of the heart's electrical activity along its normal axis, making it the standard for continuous monitoring.
Question 2: What does an isoelectric ST segment indicate on an EKG?
- Myocardial infarction
- Normal repolarization (Correct answer)
- Atrial flutter
- Ventricular hypertrophy
Correct answer: Normal repolarization
An isoelectric ST segment, level with the baseline, indicates normal ventricular repolarization without ischemia or injury.
Question 3: A patient's EKG shows a PR interval of 0.28 seconds. What does this suggest?
- Normal conduction
- First-degree AV block (Correct answer)
- Second-degree AV block Type I
- Third-degree AV block
Correct answer: First-degree AV block
A PR interval greater than 0.20 seconds with consistent P-to-QRS conduction indicates first-degree AV block.
Question 4: Which artifact on an EKG is most commonly caused by patient movement?
- 60-cycle interference
- Somatic tremor (Correct answer)
- Wandering baseline
- Electrical alternans
Correct answer: Somatic tremor
Somatic tremor artifact results from voluntary or involuntary muscle movement by the patient during recording.
Question 5: What is the standard paper speed used when recording a 12-lead EKG?
- 10 mm/sec
- 25 mm/sec (Correct answer)
- 50 mm/sec
- 100 mm/sec
Correct answer: 25 mm/sec
The standard paper speed for EKG recording is 25 mm/sec, where each small box represents 0.04 seconds.
Question 6: Which electrolyte imbalance is most associated with the appearance of U waves on an EKG?
- Hyperkalemia
- Hypokalemia (Correct answer)
- Hypercalcemia
- Hyponatremia
Correct answer: Hypokalemia
Hypokalemia is the most common cause of prominent U waves, which appear as small deflections after the T wave.
EKG certification Certification FREE EKG Certification General Question and Answers 2
Which lead is best for continuous cardiac monitoring in most clinical settings?