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The slow sweep is an outcome of the low frequency character of ________________ signal.

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The slow sweep is an outcome of the low frequency character of ________________ signal.

(a) EMG

(b) EOG

(c) ECG

(d) PCG

The question was posed to me in an interview for job.

The query is from Arrhythmias Monitor topic in division Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

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Right option is (c) ECG

Easy explanation: The slow sweep is an outcome of the low frequency character of the ECG signal. The slow sweep speed necessitates the use of a long persistence screen so as to enable a convenient observation of the waveform. Without a long persistence screen, one can only see a moving dot of light instead of a continuous trace.

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