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

AMCA EKG Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What does the P wave represent on an EKG? Atrial depolarization What does the QRS complex represent on an EKG? Ventricular depolarization What does the T wave represent on an EKG? Ventricular repolarization Which electrode placement is used for lead V1? Fourth intercostal space at the right sternal border Which electrode placement is used for lead V6? Fifth intercostal space at the midaxillary line 2 What is the standard paper speed for an EKG? 25 mm per second How many small boxes on an EKG strip equal one second? 25 small boxes What is the normal PR interval range? 0.12–0.20 seconds What is the normal duration of a QRS complex? 0.06–0.10 seconds Which lead is considered the ground electrode in a 12-lead EKG? Right leg Which rhythm originates in the SA node? Normal sinus rhythm 3 What is the heart rate if the R-R interval is 20 small boxes? 75 beats per minute What is the term for a heart rhythm that is slower than 60 beats per minute? Bradycardia What is the term for a heart rhythm that is faster than 100 beats per minute? Tachycardia Which artifact is caused by patient shivering or tremors? Somatic tremor Which artifact appears as a wandering baseline on an EKG? Baseline sway or wandering baseline What is the correct limb lead placement for lead I? Left arm positive, right arm negative 4 What is the correct limb lead placement for lead II? Left leg positive, right arm negative What is the correct limb lead placement for lead III? Left leg positive, left arm negative Which lead is best for monitoring atrial activity? Lead II Which lead is best for monitoring ventricular activity? Lead V5 or V6 What is the clinical significance of ST-segment elevation? May indicate myocardial infarction (heart attack) What is the clinical significance of ST-segment depression? May indicate myocardial ischemia