NHA Certified EKG Technician Practice Test 2.0 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

NHA Certified EKG Technician Practice Test 2.0 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified Why should the patient remove jewelry before an EKG? To prevent interference with electrode placement and electrical signals Which limb leads are placed on the patient’s arms and legs? RA on right arm, LA on left arm, RL on right leg, LL on left leg Where are the precordial leads placed on the chest? V1–V6 at specific positions across the chest Why is it important to have the patient lie still during an EKG? Movement can cause artifacts and distort the tracing What does the P wave on an EKG represent? Atrial depolarization 2 What does the QRS complex represent on an EKG tracing? Ventricular depolarization What does the T wave indicate on an EKG? Ventricular repolarization What is the normal duration of a P wave? Less than 0.12 seconds What is the normal duration of the QRS complex? 0.06–0.10 seconds Why should electrodes be applied to clean, dry skin? To ensure proper adhesion and accurate signal transmission What could cause a wandering baseline on an EKG tracing? Loose electrodes or patient movement 3 Which heart rhythm is considered normal? Normal sinus rhythm What is the purpose of a 12-lead EKG? To provide a comprehensive view of the heart’s electrical activity How should the patient be positioned for a standard EKG? Supine with arms relaxed at the sides What can cause electrical interference artifacts on an EKG? Nearby electronic devices or muscle tremors Why is proper electrode placement crucial for accurate results? Incorrect placement can mimic cardiac abnormalities What is a common symptom that might prompt an EKG? Chest pain, palpitations, or shortness of breath 4 Which EKG lead is commonly used as a reference for rhythm monitoring? Lead II What is the correct rate for a standard EKG paper speed? 25 mm/sec Why should the patient avoid talking during the EKG? Talking can create artifacts and interfere with accurate tracing Which EKG finding indicates atrial fibrillation? Irregularly irregular rhythm without distinct P