Medicine ECG and Arrhythmia 3 0b1c30e3

Which of the following can be used to calculate hea rate from an ECG?

Number of large squares in one R-R interval/300

300/ (Number of large squares in one Q-T interval)

300/ (Number of large squares in one R-R interval)

(Number of large squares in one Q-T interval) / 300

High-Yield Explanation

For calculating hea rate: HR-300/ Number of large squares(0.20 secs) in one R-R interval HR-1500/no of small squares (0.04 secs) in one R-R interval

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