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Which of the following is used to detect Ventricular Fibrillation?

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Which of the following is used to detect Ventricular Fibrillation?

(a) Shape of the QRS complexes

(b) Frequency domain analysis

(c) Timing sequence of QRS complexes

(d) Difference of the R-R interval
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The correct choice is (b) Frequency domain analysis

Explanation: Ventricular fibrillation is usually detected by frequency domain analysis.  It can be distinguished from noise by appropriately designing band-pass filters.  The system is characterized as a narrow-band, low frequency signal with energy concentrated in a band around 5-6 Hz.
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