Mayo EKG Competency FINAL EXAM STUDY GUIDE 2026 COMPLETE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS LATEST VERSION

Mayo EKG Competency FINAL EXAM STUDY GUIDE 2026 COMPLETE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS LATEST VERSION 1. PR Interval Length - ANSWER 0.12-0.20 seconds 2. QRS Complex Length - ANSWER 0.06-0.12 seconds 3. QT Interval Length - ANSWER 0.36-0.44 seconds 4. Intrinsic Rates - SA Node - ANSWER sinus brady - 60 bpm sinus - 60-100 bpm sinus tach 100-160 bpm 5. Intrinsic Rates - Junctional - ANSWER junctional brady - 40 bpm junctional - 40-60 bpm accelerated junctional - 60-100 bpm junctional tach - 100 bpm 6. Intrinsic Rates - Ventricular - ANSWER idioventricular - 20-40 bpm accelerated IVR - 40-100 bpm ventricular tach - 100-250 bpm 7. P Wave - ANSWER atrial depolarization 8. PR Interval - ANSWER delay of AV node to allow filling of ventricles (atrial conduction) 9. QRS Wave - ANSWER ventricular depolarization 10. T Wave - ANSWER ventricular repolarization 11. QT Interval - ANSWER total ventricular activity 12. Sinus Bradycardia - ANSWER Rate: 60 bpm Rhythm: regular P wave: normal, precedes each QRS QRS: narrow 13. Sinus Tachycardia - ANSWER Rate: 100-160 bpm Rhythm: regular P wave: normal, precedes each QRS QRS: narrow 14. Sinus Dysrythmia - ANSWER Rate: 60-100 bpm Rhythm: irregular P wave: normal, precedes each QRS QRS: narrow 15. What is the purpose of ECG? - ANSWER Measures electrical physiology of the heart, rate/rhythm, and electrical activity. 16. The pacemaker site within the ________ generally controls the heart. - ANSWER Atria 17. The sympathetic nervous system ___________ heart rate, conduction, and irritability. - ANSWER INCREASES 18. The parasympathetic nervous system ___________ heart rate, conduction, and irritability. - ANSWER DECREASES 19. PR Interval - ANSWER 0.12-0.20, 3-5 small boxes 20. QRS Complex - ANSWER 0.12, 3 small boxes 21. QT Interval - ANSWER 0.35-0.43 22. Refractory Period - ANSWER 2nd half of T wave, where impulses get through 23. Large Square Method - ANSWER # of big squares between two R waves, divided into 300 24. Small Square Method - ANSWER # of small squares between two R waves, divided into 1500 25. Sinus Bradycardia - ANSWER Regular 60BPM Uniform P Waves PR = 0.12-0.20 QRS = 0.12 26. Normal Sinus - ANSWER Regular 60-100 BPM Uniform P Waves PR = 0.12-0.20 QRS = 0.12 27. Sinus Tachycardia - ANSWER Regular 100 BPM Uniform P Waves PR = 0.12-0.20 QRS = 0.12 28. Sinus Arrhythmia - ANSWER Irregular Roughly 60-100 BPM 29. PJC - ANSWER Regular or Irregular Rate depends on preexisting rhythm Inverted or hidden P waves QRS = 0.12/may look slightly different than rest 30. Junctional Tachycardia - ANSWER Regular 100-180 BPM Hidden, inverted P wave PR = 0.12 QRS = 0.12/Normal 31. SVT/Atrial Tachycardia - ANSWER Regular R-R intervals Rate 150-210 BPM Hidden P waves PRI = 0.12 QRS = 0.12/Normal 32. A-Fib - ANSWER Irregular Atrial rate = 300 Hidden/No P waves QRS = 0.12/Normal 33. Atrial Flutter - ANSWER Atrial Rate = Regular