how to find peaks like P,Q,R,S and T detection of ecg signal for my data that i acquired for a period of 10 minutes(60​0000sample​s)through BIOPAC SYSTEMS MP45 with a sampling frequency of 1000hz?can anyone suggest me the code for my data

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I'm having ECG signal for a period of 10 minutes duration i.e.,600000 samples that i acquired through the BIOPAC MP45 systems with the sampling frequency of 1000 hz. i'm in need to find the peaks of the ECG signal. eventhough so many codes are there i couldn't get the peak detection for my data that i enclosed here. so i request you people to suggest me the code to find peak detection for my data as soon as possible.
  1 Comment
JohnGalt
JohnGalt on 1 Nov 2018
sounds like you should be doing some frequency analysis to isolate the heartbeats... then processing them separately...
as an ad-hoc way of getting the peaks.... you might try:
[~,~,raw ] = xlsread('10mins dataecg\haarikaresp10.xlsx');
a = cell2mat(raw);
localmaxind = 1;
localmaxs = [];
counter = 1;
for i =2:length(a)
if a(i)>a(localmaxind)
localmaxind = i;
localmaxs(counter) = i;
end
if a(i)<=0 && a(i-1)>0
counter= counter+1;
localmaxind = i;
end
end
plot(a)
hold on
plot(localmaxs,a(localmaxs),'ro')

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Answers (1)

Elias Gule
Elias Gule on 1 Nov 2018
use the 'findpeaks' function. See the docs for more info: https://www.mathworks.com/help/signal/ref/findpeaks.html

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