Exam Question and answers already passed 2023/2024

Exam Question and a When computing a heart rate from the ECG tracing, the nurse counts 15 of the small blocks between the R waves of a patient whose rhythm is regular. From these data, the nurse calculates the patient's heart rate to be A. 60 beats/min. B. 75 beats/min. C. 100 beats/min. D. 150 beats/min. - correct answer Correct answer: C Since each small block on the ECG paper represents 0.04 seconds, 1500 of these blocks represents 1 minute. By dividing the number of small blocks (15, in this case) into 1500, the nurse can calculate the heart rate in a patient whose rhythm is regular (in this case, 100). Which statement best describes the electrical activity of the heart represented by measuring the PR interval on the ECG? nswers already passed 2023/2024