PRACTICE EXAM APEX EKG COMPLETE SOLUTIONS.

PRACTICE EXAM APEX EKG COMPLETE SOLUTIONS. EKG Grid - CORRECT ANSWER Each 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 - CORRECT ANSWER Least accurate, but quickest way to estimate rate especially in irregular rhythms EKG - CORRECT ANSWER EKG intervals - CORRECT ANSWER P Wave - CORRECT ANSWER Atrial depolarization PR Interval - CORRECT ANSWER Normal is 0.12 to 0.20 seconds Corresponds to the delay the AV node provides to allow for ventricular filling QRS Complex - CORRECT ANSWER Normal is <0.12 seconds usually between 0.06 to 0.10 seconds Ventricular depolarization QT Interval - CORRECT ANSWER Normal 0.36-0.46 6 Steps for Rhythm Interpretation - CORRECT ANSWER Determine 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 - CORRECT ANSWER Regularity: 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 - CORRECT ANSWER Regularity: 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