195
Electrocardiogram
9.5 Import the data in the file “p_9_5.xls” and plot the signal. This file contains the
ECG signal of VT with clear AV dissociation.
a. Repeat the calculations in parts a, b, and c of Problem 9.1 on the recording.
b. U sing “wavemenu” and Daubeches 1 mother wavelet, decompose the signal into
five levels. Comment on the contents of each decomposition level. Apply denoising option to filter out the noise.
c. Compare a single period with one period of the signal in Problem 9.1 and
comment on the differences.
9.6 Import the data in the file “p_9_6.xls” and plot the signals. This file contains
fifteen-electrode recording of the ECG for a case of myocardial infarction with
apparent ST elevation. Use signal II or II for your analysis.
a. Repeat the calculations in parts a, b, and c of Problem 9.1 on the recording.
b. Compare a single period with one period of the signal in Problem 9.1 and
comment on the differences.
c. Is t he amplitude the only discriminating factor in the diagnosis of this
patient’s ECG?