EKG Equipment & Artifact Troubleshooting 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 EKG Equipment & Artifact Troubleshooting flashcards as text
What is the standard paper speed used for a resting 12-lead EKG in the United States?
Answer: 25 mm/sec
The standard paper speed for a resting 12-lead EKG in the US is 25 mm/sec, making each small box equal to 0.04 seconds.
Which artifact pattern on an EKG is most commonly caused by AC (alternating current) electrical interference?
Answer: 60-cycle interference producing a thick, fuzzy baseline
AC interference produces a characteristic 60-cycle per second artifact that appears as a thick, uniform fuzz on the baseline.
What is the standard sensitivity setting on most EKG machines?
Answer: 10 mm/mV
The standard sensitivity for EKG recording is 10 mm/mV, meaning a 1 mV signal produces a 10 mm deflection on the paper.
A wandering baseline artifact on an EKG is most likely caused by:
Answer: Electrode movement or poor skin preparation
Wandering baseline is most often caused by electrode movement, poor adhesion, or inadequate skin preparation such as not cleaning the electrode site.
Which of the following best describes the purpose of EKG machine calibration?
Answer: To ensure the machine records a 1 mV signal as exactly 10 mm deflection
Calibration ensures accuracy by confirming that a standard 1 mV test pulse produces the expected 10 mm deflection on the recording.
Muscle tremor artifact on an EKG most closely resembles which rhythm disturbance?
Answer: Ventricular fibrillation
Muscle tremor artifact produces irregular, rapid baseline fluctuations that can mimic the chaotic appearance of ventricular fibrillation.