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

EKG NHA Exam Questions and Answers | Latest Version | 2025/2026 | Correct & Verified Which electrode placement is correct for lead V1? A. Fifth intercostal space at midaxillary line B. Fourth intercostal space at left sternal border C. Fourth intercostal space at right sternal border D. Third intercostal space at midclavicular line What does the P wave represent on an EKG? A. Ventricular depolarization B. Ventricular repolarization C. Atrial depolarization D. Bundle branch conduction What is the normal duration of the QRS complex? A. 0.12–0.20 seconds B. 0.06–0.10 seconds 2 C. 0.20–0.30 seconds D. 0.04–0.06 seconds Which rhythm is characterized by a rapid, irregular heartbeat with no distinct P waves? Atrial fibrillation B. Ventricular tachycardia C. Sinus bradycardia D. Atrial flutter Which lead is typically used as the primary rhythm strip for continuous monitoring? A. Lead I B. Lead II C. Lead III D. aVR Which of the following is considered a ventricular arrhythmia? A. Sinus tachycardia B. Atrial flutter 3 C. Ventricular tachycardia D. Sinus bradycardia What is the normal PR interval range? A. 0.04–0.10 seconds B. 0.12–0.20 seconds C. 0.20–0.30 seconds D. 0.08–0.12 seconds Which rhythm shows a “sawtooth” pattern of P waves? A. Atrial fibrillation B. Atrial flutter C. Sinus tachycardia D. Junctional rhythm What does the T wave represent on an EKG? A. Atrial depolarization B. Ventricular repolarization 4 C. Ventricular depolarization D. PR conduction Which artifact is caused by patient movement or tremors? A. 60-cycle interference B. Somatic tremor C. Wandering baseline