Electrocardiography, Dr. D. Penney





Table 20. DETERMINATION OF HEART RATE - "Quick & Dirty" (continued....)
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The comparison of two ECG strips; one a sedentary 35 yr.-old vs. a 23 yr.-old long distance runner. [paper speed is standard (25 mm/sec.); large horizontal squares 0.2 sec.; small squares 0.04 sec.)

Method 2: (easier)

After an event occurring on the heavy black line, the rate will be 300 per min. on the next line!

After that:
....... 2nd ................. 150 per min.
....... 3rd ................. 100 per min.
....... 4th ................... 75 per min.
....... 5th ................... 60 per min.
....... 6th ................... 50 per min.
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