ECG

Welcome To My

Presentation

Course Code : EEE-321

Course title : Digital Signal Processing

Submitted to:

 Subir Sarker Lecturer

Daffodil International University

Submitted By:

Md. Anowar HossainID: 131-33-1410

Dept. of EEE (Evening)

Section: A

ECG Signal Processing

My Presentation Topic is:

Introduction

What is Electrocardiogram?

• diagnostic tool that graphically measures and records the electrical activity of the heart in detail.

• used in the extraction of vital characteristic parameters.

How signal processing important in ECG?

• When an electrical potential is generated in a section of the heart, an electrical current is conducted to the body surface in a specific area.

How ECG operates?

Matlab Functionality in ECG• Fast Fourier Transform (FFTs)• Filter- extraction of relevant signal.• Stem graphs

The major sources of noise

1. Power line interference2. Muscle contractions3. Electrode contact noise4. Motion Artifacts5. Baseline wandering

6. Noise generated by electronic devices used in signal processing circuits7. Electrical interference external to the subject and recording system8. High-frequency noises in the ECG9. Breath, lung, or bowel sounds contaminating the heart sounds (PCG).

The ECG

How ECG works. An ECG signal is due to ionic current

flow causing the cardiac fibers to contract and relax, subsequently, generating a time variant periodic signal

the potential difference between two electrodes placed on the skin surface is considered as an input to the ECG plotter

Mother Wavelet applied for denoising of the ECG signal retains the signal peaks close to their

full amplitude

Wavelet Theory signal compression feature extraction small extent in denoising

Noise Solutions

ECG Signal Processing aims artefact reduction

ECG signals cleaner better interpretable

at revealing aspects not immediately observable

at diagnostics decision support and automated ECG signal interpretation

Sample Matlab code of ECG

Output Figure:

Thank You