FREE EKG Certification General Question and Answers Flashcards
6 cards from real EKG certification Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE EKG Certification General Question and Answers flashcards as text
In a 12-lead EKG, which leads view the lateral wall of the heart?
Answer: I, aVL, V5, V6
Leads I, aVL, V5, and V6 are positioned to view the lateral wall of the left ventricle.
What is the significance of a QRS complex duration greater than 0.12 seconds?
Answer: Possible bundle branch block
A widened QRS complex exceeding 0.12 seconds suggests abnormal ventricular conduction, most commonly a bundle branch block.
How many small boxes on standard EKG paper equal 1 millivolt of amplitude?
Answer: 10 small boxes
At standard calibration of 10 mm/mV, 1 millivolt equals 10 small boxes or 2 large boxes in height.
Which EKG finding is characteristic of atrial fibrillation?
Answer: Irregularly irregular R-R intervals with absent P waves
Atrial fibrillation is identified by an irregularly irregular ventricular rhythm with no discernible P waves replaced by fibrillatory waves.
Where should the V4 precordial lead be placed on the patient's chest?
Answer: Left midclavicular line, 5th intercostal space
V4 is placed at the left midclavicular line in the 5th intercostal space, serving as the anchor point for V5 and V6 placement.
What does a tall, peaked T wave on an EKG most commonly indicate?
Answer: Hyperkalemia
Tall, narrow, peaked T waves are a hallmark early sign of hyperkalemia and require prompt clinical evaluation.