HERE I FIND FOURIER TRANSFORM OF ECG SIGNAL USING MATLAB. THE SIGNAL IS COLLECTED FROM DATABASE AND I GIVEN HERE MATLAB CODE

2. Electrocardiography (ECG or EKG) is the process of
recording the electrical activity of the heart over a
period of time using electrodes placed on the skin.
These electrodes detect the tiny electrical changes on the
skin that arise from the heat
muscle's electrophysiologic pattern
of depolarizing and repolarizing during each heartbeat.
It is very commonly performed to detect any cardiac
problems.

3.  In a conventional 12-lead ECG, ten electrodes are placed on
the patient's limbs and on the surface of the chest. The
overall magnitude of the heart's electrical potential.
 Is then measured from twelve different angles ("leads") and
is recorded over a period of time (usually ten seconds).
 In this way, the overall magnitude and direction of the
heart's electrical depolarization is captured at each moment
throughout the cardiac cycle.
 The graph of voltage versus time produced by
this noninvasive medical procedure is
an electrocardiogram.

5.  3 distinct waves are produced during cardiac cycle.
 P wave-artial depolarization.
 QRS complex-ventricular depolarization.
 T-wave-ventricular repolarization.

7. •The Fourier transform is a mathematical
function that takes a time-based pattern as
input and determines the overall cycle offset,
rotation speed and strength for every possible
cycle in the given pattern.
• The Fourier transform is applied to
waveforms which are basically a function of
time, space or some other variable.
• The Fourier transform decomposes a
waveform into a sinusoid and thus provides
another way to represent a waveform.

8.  Use matlab to plot the fourier transformed
signal of ecg
 Data is collected from data base

13.  First go to physionet website
 Then go to physiobank
 After go databases
 Then go to wave forms and then to ecg data
base
 After collecting data
 Data is saved in matfile
 This file is opened physiobank atm
 Then write a code on matlab

14.  load('100m')
 x=val(1,:);
 subplot(2,1,1);
 plot(x);
 xlabel('time');
 ylabel('amplitude');
 title('ECG SIGNAL');
 y=fft(x);
 z=abs(y);
 subplot(2,1,2);
 plot(z);
 xlabel('time');
 ylabel('amplitude');
 title('FOURIER TRANFORM OF ECG SIGNAL');

15.  This collection of 48 fully annotated half-
hour two-lead ECGs is available here in its
entirety. The MIT-BIH Arrhythmia Database
Directory is also available on-line.

17.  This is a collection of long-term ECG
recordings of patients who experienced
sudden cardiac death during the recordings.
Half-hour excerpts of these recordings are
available as the MIT-BIH Malignant
Ventricular Arrhythmia Database

19.  Five-minute multichannel fetal ECG
recordings, with cardiologist-verified
annotations of all fetal heart beats, from five
women in labor, from the Medical University
of Silesia, Poland. Each record includes four
signals from the maternal abdomen and a
simultaneously recorded reference direct fetal
ECG from the fetal scalp; all signals are
sampled at 1 KHz with 16-bit resolution.

21.  Between 2 and 20 short single-lead ECG
recordings from 90 volunteers, collected to
support studies of using the ECG for
biometric identification. An
excellent summary of the thesis for which
this collection was assembled is also
available.

23.  We conclude that ECG are used to diagnosed to
heart related problems and used to physiology of
organs. This is very useful technique of reduce
heart attacks

24.  https://physionet.org/
 https://physionet.org/physiobank/database/
mitdb/
 https://physionet.org/physiobank/database/
ecgiddb/