Ventricular Fibrillation is detected by _________(a) Shape of the QRS complexes(b) Difference of the R-R interval(c) Timing sequence of QRS complexes(d) Frequency domain analysisThe question was asked in unit test.The query is from Phonocardiography (PCG) in portion Biomedical Recorders of Biomedical Instrumentation

Ventricular Fibrillation is detected by _________(a) Shape of the QRS

1.	Ventricular Fibrillation is detected by _________(a) Shape of the QRS complexes(b) Difference of the R-R interval(c) Timing sequence of QRS complexes(d) Frequency domain analysisThe question was asked in unit test.The query is from Phonocardiography (PCG) in portion Biomedical Recorders of Biomedical Instrumentation
Answer» The correct option is (d) Frequency domain analysis The best I can explain: Ventricular fibrillation is USUALLY DETECTED by frequency domain analysis. The system is CHARACTERIZED as a narrow-band, low frequency signal with energy concentrated in a band AROUND 5-6 Hz. It can be distinguished from noise by appropriately designing band-pass FILTERS.

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