Question

What is diagnostically useful frequency range?

(a) 0.025 to 0.05 Hz

(b) 0.05 to 150 Hz

(c) 150 to 200 Hz

(d) 0.05 to 150 MHz

The question was posed to me in quiz.

Enquiry is from System Concepts in section Patient Monitoring System of Biomedical Instrumentation

Answer 1

The correct option is (b) 0.05 to 150 Hz

Explanation: Although the electric field generated by the heart can be best characterized by vector quantities, it is generally convenient to directly measure only scalar quantities, i.e. a voltage difference of mV order between the given points of the body. The diagnostically useful frequency range is usually accepted as 0.05 to 150 Hz (Golden et al 1973).