How is the rate determined on an ECG when the ventricular heart rate is irregular?
A. Count the number of QRS complexes in a 2 vertical marks then multiply by 6
B. Count the number of QRS complexes in a 2 vertical marks then multiply by 10
C. Count the number of QRS complexes in 3 vertical marks then multiply by 10
D. Count the number of QRS complexes in a 3 vertical marks then multiply by 6
Answer: B
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