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

NHA EKG Technician Test Review Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What artifact is caused by muscle tremors or shivering? Somatic tremor What artifact results from poor electrode contact or dried gel? Wandering baseline What should a technician do if an EKG tracing shows 60-cycle interference? Check for electrical devices and grounding issues Which rhythm is irregularly irregular with absent P waves? Atrial fibrillation Which rhythm shows a sawtooth pattern of P waves? Atrial flutter 2 Which rhythm is characterized by wide, bizarre QRS complexes with no preceding P waves? Ventricular tachycardia Which rhythm is rapid, chaotic, and has no effective cardiac output? Ventricular fibrillation Which rhythm originates in the sinoatrial (SA) node? Normal sinus rhythm What is the correct placement for the right leg electrode in a 12-lead EKG? On the right ankle or lower right leg Which waveform represents atrial depolarization? P wave Which waveform represents ventricular depolarization? QRS complex 3 Which waveform represents ventricular repolarization? T wave What is the normal duration of a QRS complex in adults? 0.06–0.10 seconds Which interval represents the time between atrial and ventricular contraction? PR interval What is the normal range for a PR interval? 0.12–0.20 seconds Which interval represents the total time for ventricular depolarization and repolarization? QT interval Which patient position is most appropriate for a standard EKG? Supine 4 Which lead is most commonly used for continuous cardiac monitoring? Lead II Which rhythm originates above the ventricles but is faster than normal sinus rhythm? Supraventricular tachycardia What is the term for a slow heart rate below 60 bpm?