EKG Practice Exam 2 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

EKG Practice Exam 2 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the correct method to reduce 60-cycle interference on an EKG tracing? Ensure proper grounding and remove nearby electrical devices Which rhythm is characterized by three or more PVCs in a row? Ventricular tachycardia Which action is correct if a patient reports dizziness during EKG monitoring? Stop the procedure and notify the provider immediately What does a ST-segment elevation indicate? Possible acute myocardial infarction Which rhythm has a regular rate with a P wave preceding each QRS complex? 2 Normal sinus rhythm Which part of the EKG represents the refractory period of the ventricles? ST segment What is the first step in preparing a patient for an EKG? Explain the procedure and obtain patient consent Which electrode placement is located on the right arm for a standard EKG? RA (right arm) Which lead is commonly used for rhythm monitoring during a stress test? Lead II What is the significance of a prolonged PR interval on an EKG? It may indicate first-degree heart block What should a medical assistant do if the patient’s EKG shows artifact due to muscle tremors? 3 Ask the patient to relax and remain still Which rhythm is characterized by an irregularly irregular heartbeat with no discernible P waves? Atrial fibrillation What is the normal range for the QRS complex duration? 0.06–0.10 seconds Which EKG finding is commonly associated with hyperkalemia? Tall, peaked T waves What is the correct position of V3 electrode on the chest? Between V2 and V4 on the anterior chest Which rhythm is characterized by a sawtooth pattern of atrial waves? Atrial flutter What is the normal range for a QT interval? 4 0.36–0.44 seconds Which rhythm originates in the ventricles and can be life-threatening if sustained? Ventricular tachycardia What is the appropriate paper speed for a standard resting EKG? 25 mm/sec Which action should be taken if limb electrodes produce a wandering baseline? Check electrode placement and skin preparation