RELIAS MEDICAL-SURGICAL TELEMETRY COMPREHENSIVE EXAM QUESTIONS COMPLETE WITH 100% VERIFIED ANSWERS AND RATIONALE

RELIAS MEDICAL-SURGICAL TELEMETRY COMPREHENSIVE EXAM QUESTIONS COMPLETE WITH 100% VERIFIED ANSWERS AND RATIONALE Question 1: What does the P wave represent? A. Ventricular repolarization B. Atrial depolarization C. Ventricular depolarization D. Atrial repolarization CORRECT ANSWER: B. Atrial depolarization Rationale: The P wave represents atrial depolarization, which is the electrical activation of the atria that leads to atrial contraction. ________________________________________ Question 2: What is the normal duration of the PR interval? A. 0.20-0.30 seconds B. 0.10-0.12 seconds C. 0.12-0.20 seconds D. 0.04-0.08 seconds CORRECT ANSWER: C. 0.12-0.20 seconds Rationale: The normal PR interval measures 0.12 to 0.20 seconds (3-5 small boxes on standard ECG paper), representing the time from atrial depolarization to ventricular depolarization. ________________________________________ Question 3: What does the QRS complex represent? A. Ventricular repolarization B. Atrial depolarization C. Atrial repolarization D. Ventricular depolarization CORRECT ANSWER: D. Ventricular depolarization Rationale: The QRS complex represents ventricular depolarization, the electrical activation of the ventricles that triggers ventricular contraction. ________________________________________ Question 4: What is the normal duration of the QRS complex? A. Less than 0.12 seconds B. 0.20-0.30 seconds C. 0.12-0.20 seconds D. Greater than 0.30 seconds CORRECT ANSWER: A. Less than 0.12 seconds Rationale: The normal QRS duration is less than 0.12 seconds (3 small boxes), indicating normal conduction through the ventricles. ________________________________________ Question 5: What does the T wave represent? A. Ventricular depolarization B. Atrial depolarization C. Ventricular repolarization D. Atrial repolarization CORRECT ANSWER: C. Ventricular repolarization Rationale: The T wave represents ventricular repolarization, the recovery phase of the ventricles after contraction. ________________________________________ Question 6: What is the normal heart rate for a sinus rhythm? A. 100-150 bpm B. 60-100 bpm C. 40-60 bpm D. 20-40 bpm CORRECT ANSWER: B. 60-100 bpm Rationale: Normal sinus rhythm has a rate of 60-100 beats per minute with normal P waves, PR interval, and QRS duration. ________________________________________ Question 7: What is the intrinsic rate of the SA node? A. 20-40 bpm B. 40-60 bpm C. 60-100 bpm D. 100-150 bpm CORRECT ANSWER: C. 60-100 bpm Rationale: The SA node has an intrinsic firing rate of 60-100 bpm and serves as the primary pacemaker of the heart. ________________________________________ Question 8: What is the intrinsic rate of the AV junction? A. 20-40 bpm B. 60-100 bpm C. 100-150 bpm D. 40-60 bpm CORRECT ANSWER: D. 40-60 bpm Rationale: The AV junction has an intrinsic rate of 40-60 bpm and serves as the secondary pacemaker when the SA node fails. ________________________________________ Question 9: What is the intrinsic rate of the ventricles? A. 60-100 bpm B. 20-40 bpm C. 40-60 bpm D. 100-150 bpm CORRECT ANSWER: B. 20-40 bpm Rationale: The ventricles have an intrinsic rate of 20-40 bpm, serving as a tertiary pacemaker when higher pacemakers fail. ________________________________________ Question 10: Where is the V1 electrode placed? A. 5th intercostal space, midclavicular line B. 4th intercostal space, left sternal border C. 5th intercostal space, anterior axillary line D. 4th intercostal space, right sternal border CORRECT ANSWER: D. 4th intercostal space, right sternal border Rationale: V1 is placed at the 4th intercostal space, right sternal border to monitor septal leads. ________________________________________ Question 11: Where is the V2 electrode placed? A. 4th intercostal space, left sternal border B. 5th intercostal space, midclavicular line C. 5th intercostal space, anterior axillary line D. 4th intercostal space, right sternal border CORRECT ANSWER: A. 4th intercostal space, left sternal border Rationale: V2 is placed at the 4th intercostal space, left sternal border, mirroring V1 placement on the left side. ________________________________________ Question 12: Where is the V4 electrode placed? A. 4th intercostal space, left sternal border B. 5th intercostal space, midaxillary line