University of Minnesota NURS N/AECG_interpretation_answers (1)-VERIFIED BY EXPERTS-ALL ANSWERS CORRECT

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CH 8 - ECG INTERPRETATION EXERCISES - ANSWERS ECG INTERPRETATION EXERCISE 1: BASIC STRIP INTERPRETATION 1. Identify the P wave, QRS complex, and T wave 2.Measure the PR interval, QRS complex and QT... interval PR interval: ___0.12 sec._____________ QRS complex: __0.06 sec.___________ QT interval: ____0.36 sec.___________ 3.Measure the PR interval, QRS complex, and QT interval PR interval: ____0.16 sec._________ QRS complex: __0.06 sec.________QT interval: ____0.40 sec._________ 4. Calculate the heart rate 4. This is a fairly regular rhythm and a 6-second strip. All of these methods provide a quick approximation of heart rate assuming that the pulse is relatively regular. Taking the pulse for a full minute provides the most accurate HR. (1) Six-second strip method: Count the number of QRS complexes (12) and multiply by 10; therefore, 10 x 12 = 120 bpm. (2) Large block method: You can approximate the HR by choosing any two consecutive QRS complexes and counting the number of large boxes (almost 2.5 in this strip). 300 (number of large boxes in a minute) divided by 2.5 large blocks = HR; therefore, 300  2.5  120 bpm. (3) Small block method: There are 12.5 small boxes between QRSs. 1500 (number of small boxes in 60 seconds) divided by number of small boxes between QRSs; therefore, 1500  12.5 = 120 bpm. ECG INTERPRETATION EXERCISE 2: SINUS DYSRHYTHMIAS 1.QRS complexes: Present, all shaped the same Regularity: Regular rhythm, HR: 120 bpm P waves: Upright, matching, 1 per QRS, P-P interval regular PR interval: 0.14 seconds, QRS interval: 0.08 seconds; QT interval: 0.32 seconds Interpretation: Sinus tachycardia [Show More]

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