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Which of the following instrument records the electrical activity of the heart?

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Which of the following instrument records the electrical activity of the heart?

(a) VCG(Vectorcardiograph)

(b) PCG(Phonocardiograph)

(c) ECG(Electrocardiograph)

(d) EEG

The question was asked by my school teacher while I was bunking the class.

Question is from System Concepts in chapter Patient Monitoring System of Biomedical Instrumentation

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Right option is (c) ECG(Electrocardiograph)

Explanation: The electrocardiograph (ECG) is an instrument, which records the electrical activity of the heart. Electrical signals from the heart characteristically precede the normal mechanical function and monitoring of these signals has great clinical significance.

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