NHA EKG Certification Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

NHA EKG Certification Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the primary purpose of an EKG test? To record the electrical activity of the heart Which lead is considered the standard reference for monitoring heart rhythm? Lead II What does the P wave represent on an EKG tracing? Atrial depolarization What does the QRS complex represent on an EKG tracing? Ventricular depolarization What does the T wave represent on an EKG tracing? Ventricular repolarization 2 Why is it important to ensure proper electrode placement before starting an EKG? To obtain an accurate reading and avoid artifacts What is the normal heart rate range for an adult at rest? 60–100 beats per minute Which patient position is generally used for a standard 12-lead EKG? Supine with arms at the sides Why should a patient avoid moving or talking during an EKG recording? Movement can create artifacts that interfere with accurate readings How can muscle tremors affect an EKG tracing? They cause irregular spikes and interfere with interpretation Which lead placement is used for monitoring arrhythmias in a continuous cardiac monitor? Limb leads I, II, and III 3 What is the first step in preparing a patient for an EKG? Explain the procedure and obtain consent Why is it important to remove excess hair at electrode sites? To ensure proper electrode adhesion and signal quality What can cause a wandering baseline on an EKG tracing? Poor electrode contact or patient movement What is the significance of a flat or absent T wave? It may indicate myocardial ischemia or electrolyte imbalance Why should the patient avoid caffeine or nicotine before an EKG? They can increase heart rate and alter results Which lead is commonly used for rhythm strip monitoring in emergencies? Lead II 4 How should a patient with chest pain be positioned for a 12-lead EKG? Supine with minimal movement and arms relaxed What is the function of precordial leads? To record electrical activity across the chest and detect localized issues Why must EKG electrodes be placed on clean, dry skin? To improve conduction and reduce artifacts What is a common artifact caused by loose electrodes? Interrupted or distorted waveforms Which condition is indicated by a prolonged PR interval? First-degree heart block Which condition may be suggested by a wide QRS complex? Bundle branch block or ventricular