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_________ is a signal of low amplitude and low frequency content.

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_________ is a signal of low amplitude and low frequency content.

(a) QRS complex

(b) R-R interval

(c) ST segment

(d) T-P interval

This question was addressed to me by my college professor while I was bunking the class.

Question is taken from QRS Detection Techniques in section Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

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The correct answer is (c) ST segment

Easiest explanation: The ST segment is a signal of low amplitude and low-frequency content. Therefore, a sampling rate of 250 samples /s is adequate. To ensure that the ST segment can be measured accurately, the incoming ECG signals must have a low-end bandwidth of 0.05 Hz.

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