The following diagram is what a nurse saw on a patient's ECG trace, which measures the electrical impulse passed by the heart in one heartbeat. The first arrow on the left signifies the beginning of the beat and the second arrow on the right signifies the end of the beat
How many beats per minute did the nurse find in this patient?

(a) 100
(b) 75
(c) 60
(d) 54

Options

A. 100
B. 75
C. 60
D. 54

Answer

B