NHA Certified EKG Technician- Test 1 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

NHA Certified EKG Technician- Test 1 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the significance of a prolonged PR interval? First-degree atrioventricular (AV) block Which rhythm shows irregularly irregular ventricular activity with no discernible P waves? Atrial fibrillation What should a medical assistant do if a patient becomes dizzy during an EKG? Stop the test, have the patient lie down, and notify the provider Which rhythm is characterized by sawtooth P waves? Atrial flutter Which rhythm originates in the ventricles and has wide, bizarre QRS complexes? Ventricular tachycardia 2 What is the primary purpose of a 12-lead EKG? To assess electrical activity of the heart and detect abnormalities Which rhythm is considered too fast if it exceeds 100 beats per minute? Tachycardia Which rhythm is considered too slow if it is below 60 beats per minute? Bradycardia Which EKG artifact is caused by patient movement or muscle tremors? Somatic tremor What does the P wave represent on an EKG? Atrial depolarization What does the QRS complex represent? Ventricular depolarization 3 What does the T wave represent? Ventricular repolarization Which electrode site is correct for V1 placement? Fourth intercostal space at the right sternal border Which electrode site is correct for V6 placement? Fifth intercostal space at the midaxillary line Which rhythm originates in the sinoatrial (SA) node? Normal sinus rhythm What is the purpose of an EKG in a patient with chest pain? To detect cardiac ischemia or infarction What is the correct placement for the right leg electrode in a 12-lead EKG? On the lower right leg, just above the ankle 4 What does an inverted T wave indicate on an EKG? Possible myocardial ischemia or ventricular strain Which lead is used to monitor the lateral wall of the heart? Leads I, aVL, V5, and V6 Which lead is most commonly used for continuous rhythm monitoring? Lead II What is the normal range for a resting adult heart rate? 60–100 beats per minute Which EKG interval represents the time from atrial depolarization to ventricular depolarization? PR interval What is the normal duration of a PR interval? 0.12–0.20 seconds 5 Which rhythm originates above the ventricles? Supraventricular rhythm Which rhythm originates in the ventricles?