APEX EKG Test Questions And Answers Latest Top Score.

APEX EKG Test Questions And Answers Latest Top Score. 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 Sinus Tachycardia - correct answer. Regularity: atrial and ventricular rate are regular Rate: >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 Arrhythmia - correct answer. Regularity: 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 - correct answer. Regularity: 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 - correct answer. Regularity: underlying atrial rate is regular except for early beat, ventricular rate is regular Rate: determined by the underlying rhythm P wave: upright, smooth, round and uniform shape, EXCEPT for the premature beat, it will shaped differently PRI : 0.12 to 0.20 seconds except for early beat QRS: 0.06 to 0.10 seconds and all are uniform QTI: 0.36 to 0.46 seconds T wave: upright, smooth and round uniform shape Other: because the electrical stimulus is originating somewhere in the atria (but NOT the SA node) it affects the P wave formation Atrial Fibrillation - correct answer. Regularity: atrial and ventricular rate irregularly irregular Rate: Atrial rate: unable to determine they are beating in excess of 350 to 700 beats per minute Ventricular rate: when the HR is 100 or less beats per minute, the rate is said to be "controlled"; if the ventricular rate is > 100 beats per minute then the rhythm is said to have a RVR (rapid ventricular response) P wave: absent, indiscernible, replaced by fibrillatory waves PRI : indiscernible QRS: 0.06 to 0.10 seconds QTI: may be indiscernible T wave: may be indiscernible Atrial Flutter - correct answer. Regularity: atrial usually regular, ventricular rate may be irregular depending on the conduction rate thru the AV node Rate: Atrial rate: 250 to 350 beats per minute Ventricular rate: usually 60 to 150 beats per minute depending on the conduction thru the AV node P wave: abnormal, sawtoothed appearance known as "flutter waves", also described as "picket fence shaped or V-shaped" PRI : indiscernible, because there are no true P waves QRS: 0.06 to 0.10 seconds QTI: indiscernible T wave: indiscernible Atrial Tachycardia - correct answer. Regularity: R-R intervals are regular, overall rhythm is regular Rate: Atrial and ventricular rates are the same. The rate is usually between 160-250 beats/min P wave: There is one p wave in front of every QRS. The P waves may appear different than a sinus P wave due to the rapid rate. They can be notched or flattened, and in some cases the P wave may be lost within the QRS complex PRI : 0.12 to 0.20 seconds, PRI is consistent, but may not be easily measured due to the rate QRS: 0.06 to 0.10 seconds and all are uniform QTI: usually indiscernible T wave: usually indiscernible