5

Question 1

common source of artifact in chest-lead ECG

Answer 1

EEG

Question 2

filter most suitable to remove harmonics of power-line interference

Answer 2

comb filter

Question 3

artefacts present in the normal ECG signal (3 types)

Answer 3

DC offset, Power line interference, Baseline wander

Question 4

describe SIGNAL and NOISE

Answer 4

Signal is information of interest,
noise is unwanted information.

Question 5

filter used to enhance the fetus ECG signal

Answer 5

adaptive filter

Question 6

components of an adaptive filter

Answer 6

a subtractor, feedback, input signals from 2 sources

Question 7

classical filters unable to remove the background noise of maternal-fetal ECG (bandwidth)

Answer 7

bandwidth of noise present over entire frequency spectrum

Question 8

are artefact, interference and noise similar

Answer 8

yes

Question 9

ECG signal facts (corruption, frequency, nature)

Answer 9

easily corrupted with power-line interference
frequency is about 1-2 Hz
deterministic in nature

Question 10

difference in mother’s and fetus’s ECG

Answer 10

fetus’s heart rate is higher

Question 11

source of noise to biosignals

Answer 11

environment of the test, physiological, instrumentation used

Question 12

how do you estimate the fetus’s heart rate

Answer 12

obtain the R-R interval of mother’s and fetus’s ECG and do interpolation

Question 13

required in the filter to obtain the fetus ECG signal (1f,2m)

Answer 13

Fetus cardiac signal
mother’s abdominal and chest lead ECG