12-Lead ECG (2nd Edition) Edit edition

This problem has been solved:

Solutions for Chapter 7…

The rate of the wave complexes recorded on the ECG paper needs evaluation for getting the useful information about heart rate. The rate is calculated by considering the QRS complex peak that starts on the thick line of ECG paper as starting point. The next QRS complex peak is used as the end point.

The distance between the starting point and the end point is measured using calipers. The numbers for the measurement of the rate from the starting point start from 300.

Hence, option D is not the correct answer.

The numbers start from 300 and end at 50. In between there are 4 numbers in series 150 - 100 – 75 – 60.

The answers given in options (A) and (C) do not include the above mentioned numbers in series. Also, the answer given in option (B) is correct and therefore option (E), stating ‘none of the above’ is not correct.

Hence, options (A), (C), (D) and (E) are not the correct answers.

The numbers to remember while calculating rates are 300-150-100-75-60-50.

Hence, the correct answer is option.