Question

The unit of sensitivity of an electrocardiograph is ________

(a) m/mV

(b) mm/V

(c) mm/mV

(d) m/V

I have been asked this question in final exam.

This key question is from Measurement of Hearing in chapter Audiometry of Biomedical Instrumentation

Answer 1

The correct answer is (c) mm/mV

Best explanation: The unit of the sensitivity of an electrocardiograph is mm/mV.  The sensitivity of an electrocardiograph is typically set at 10 mm/mV. Time measurements and heart rate measurements are made horizontally on the electrocardiogram. For routine work, the paper recording speed is 25 mm/s.