NAVLE® Question of the day

During a routine exam for vaccines in a one-year-old male neutered cat, it is difficult to obtain an accurate heart rate. The cat is tachycardic but you suspect this may be due to stress rather than disease and obtain an ECG to better assess the rate.

The ECG shows a regular sinus rhythm. The paper speed is 50 mm/sec and one small box = 1 mm; 5 small boxes = 5 mm.

What is the cat’s heart rate in beats per minute?

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