APEX EKG Test Exam Questions And Answers |Latest 2025 | Guaranteed Pass

©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+ 1 APEX EKG Test Exam Questions And Answers |Latest 2025 | Guaranteed Pass EKG Grid - AnswerEach small square (the smaller lighter boxes within the big bold boxes) represents 0.04 seconds Each larger square (the boxes within the bold lines) represents 0.2 seconds. Each large square has 5 small squares across SO 0.04 X 5 = 0.2 seconds The 6 Second Strip Method - AnswerLeast accurate, but quickest way to estimate rate especially in irregular rhythms EKG - EKG intervals - P Wave - AnswerAtrial depolarization PR Interval - AnswerNormal is 0.12 to 0.20 seconds Corresponds to the delay the AV node provides to allow for ventricular filling QRS Complex - AnswerNormal is <0.12 seconds usually between 0.06 to 0.10 seconds Ventricular depolarization ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+ 2 QT Interval - AnswerNormal 0.36-0.46 6 Steps for Rhythm Interpretation - AnswerDetermine Regularity Calculate the Rate Evaluate the P wave Measure the PRI Evaluate the QRS Width Evaluate the T wave and Calculate the QTI Normal Sinus Rhythm - AnswerRegularity: atrial and ventricular rate are regular Rate: 60 to 100 beats per minute P wave: upright, smooth, round and uniform shape, one for every QRS complex PRI : 0.12 to 0.20 seconds QRS: 0.06 to 0.10 seconds QTI: 0.36 to 0.46 seconds T wave: upright, smooth and round uniform shape Sinus Bradycardia - AnswerRegularity: atrial and ventricular rate are regular Rate: < 60 beats per minute P wave: upright, smooth, round and uniform shape, one for every QRS complex PRI : 0.12 to 0.20 seconds QRS: 0.06 to 0.10 seconds QTI: 0.36 to 0.46 seconds T wave: upright, smooth and round uniform shape Sinus Tachycardia - AnswerRegularity: atrial and ventricular rate are regular Rate: >100 beats per minute ©THESTAR 2025 ALL RIGHTS RESERVED 10:34 PM A+ 3 P wave: upright, smooth, round and uniform shape, one for every QRS complex PRI : 0.12 to 0.20 seconds QRS: 0.06 to 0.10 seconds QTI: 0.36 to 0.46 seconds T wave: upright, smooth and round uniform shape Sinus Arrhythmia - AnswerRegularity: atrial and ventricular rate are the same but the rhythm will be slightly irregular Rate: variable, can be bradycardia to normal P wave: upright, smooth, round and uniform shape, one for every QRS complex PRI : 0.12 to 0.20 seconds QRS: 0.06 to 0.10 seconds QTI: 0.36 to 0.46 seconds T wave: upright, smooth and round uniform shape Sinus Arrest and Sinus Pause - AnswerRegularity: Regular but interrupted (by a pause) Rate: can occur at any heart rate P wave: normal sinus P waves before the pause PRI: 0.12 to 0.20 seconds before the pause, may be shorter or absent after the pause QRS: 0.06 to 0.10 seconds on the sinus beats, on the escape beats the QRS may be narrow or wide depending on which pacemaker of the heart resumes after the pause QTI: 0.36 to 0.46 seconds for the sinus beats Premature Atrial Contractions PACs - AnswerRegularity: underlying atrial rate is regular except for early beat, ventricular rate is regular Rate: determined by the underlying rhythm