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ACI CBET (CBET) Practice Tests & Test Prep by Exam Edge - Topics



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Understanding what is on the ACI CBET exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

  • Directs your study efforts toward the most relevant areas.
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There is no doubt that this is a strategic step in achieving certification and advancing your career.

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ACI Certified Biomedical Equipment Technician Exam Blueprint

ACI Certified Biomedical Equipment Technician - Exam Topics Sample Questions

All but which of the following might be considered physiological interferences that can cause artifact with the ECG?

Correct Answer:
loose electrodes
to address the question of which of the listed factors might not be considered physiological interferences causing artifacts in an electrocardiogram (ecg), it is essential to understand what constitutes physiological versus non-physiological interferences.

physiological interferences in the context of an ecg are generally those caused by the body's own natural activities. these include: - **tremors**: involuntary, rhythmic muscle contractions that can affect ecg readings by adding spurious spikes or erratic baseline movements. - **breathing actions**: respiratory movements can lead to baseline wander in ecg recordings due to the shifting of the electrode relative to the heart. - **patient movement**: any voluntary or involuntary movement by the patient during the ecg can disrupt the stability of the baseline or introduce spikes and other artifacts. - **skeletal muscle contractions**: muscle activities, especially in the chest and back, can introduce additional electrical activity that may be picked up by the ecg, resulting in interference that might be mistaken for heart muscle activity.

on the other hand, non-physiological interferences are typically external factors that affect the recording but are not caused by the body's natural functions. examples include: - **loose electrodes**: this is an example of a technical or mechanical issue rather than a physiological interference. loose electrodes can result in poor contact with the skin, leading to interruptions in the signal and potential artifacts such as erratic spikes or loss of signal. since the artifact is due to an equipment issue and not a biological action of the patient, it is considered non-physiological.

therefore, answering the original question, all options listed except "loose electrodes" might be considered physiological interferences. loose electrodes, being related to the equipment rather than the patient's physiological actions, do not fit into the category of physiological interferences and thus represent the correct answer to the question.