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Which of the following instrument is used for recording the sounds connected with the pumping action of the heart?

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Which of the following instrument is used for recording the sounds connected with the pumping action of the heart?

(a) ECG

(b) VCG

(c) PCG

(d) EEG

The question was asked during a job interview.

My question is taken from Measurement of Temperature in section Patient Monitoring System of Biomedical Instrumentation

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Right answer is (c) PCG

Easy explanation: The phonocardiograph is an instrument used for recording the sounds connected with the pumping action of the heart. These sounds provide an indication of the heart rate and its rhythmicity. They also give useful information regarding the effectiveness of blood pumping and valve action.

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