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NHA Certified EKG Technician (cet) Practice Tests & Test Prep by Exam Edge - Review



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NHA Certified EKG Technician - Reviews


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Based on 125 reviews

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See why our users from 154 countries love us for their exam prep! Including 125 reviews for the NHA Certified EKG Technician exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 125 reviews

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NHA Certified EKG Technician - Test Reviews Sample Questions

If a U wave is present on an electrocardiogram, which of the following would it be indicative of?

Correct Answer:
repolarization of the purkinje fibers


the u wave in an electrocardiogram (ecg) is a small wave that follows the t wave and usually appears in the same direction as the t wave. it is typically seen in the ecg of healthy individuals, but its exact origin and clinical significance can vary. it is generally thought to represent the repolarization of the purkinje fibers, which are specialized conductive fibers located within the heart. these fibers play a crucial role in the heart's electrical conduction system, ensuring rapid and coordinated transmission of electrical impulses through the ventricles, which is necessary for maintaining a regular and effective heartbeat.

typically, the u wave is most apparent when heart rate is slow, and its visibility can be influenced by various factors, including electrolyte levels, particularly potassium. abnormalities in u wave amplitude or morphology can sometimes indicate underlying medical conditions, such as hypokalemia (low potassium levels), hyperkalemia (high potassium levels), or other cardiac or non-cardiac conditions.

in the context of the given question, it's important to clarify that the u wave does not represent ventricular depolarization or atrial depolarization. ventricular depolarization, which corresponds to the spreading of electrical impulses through the ventricles, is depicted by the qrs complex on an ecg. atrial depolarization, depicted by the p wave, represents the electrical activity that initiates the contraction of the atria.

thus, when considering the options provided — ventricular depolarization, repolarization of the purkinje fibers, and atrial depolarization — the correct answer regarding the significance of the u wave on an electrocardiogram is the repolarization of the purkinje fibers. this understanding helps in the accurate interpretation of ecgs and can guide appropriate clinical responses to changes observed in u wave characteristics.