Page 45 - AACN Essentials of Critical-Care Nursing Pocket Handbook, Second Edition
P. 45

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              Heart Rate Determination Using the Electrocardiogram Large Boxes



                 Heart Rate (Beats/Min)  300  150  100  75  60  50  40  38  33  30












                 Number of Large Boxes Between R Waves  1  2  3  4  5  6  7  8  9  10























              3.7
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