How to calculate the heart rate from an ECG signal?
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Hi, I have for example this ecg signal from how I did the plot in time:
load 'sig.mat'
fs = 300;
t=linspace(0,length(sig)/fs,length(sig));
figure()
plot(t,sig/max(sig));
title('Signal in Time Domain');
xlabel('Time(s)');
ylabel('Amplitude');
And from the plot I roughly calculate in the x axis the time between one peak (R wave) to the other. That is circa 1.5 s. If the distance between two R peaks in an ECG is approximately 1.5 seconds, I calculate the heart rate based on that interval.
Converting 1.5 seconds to milliseconds:
1.5 seconds * 1000 = 1500 milliseconds
Now, we can calculate the heart rate:
Heart Rate = 60,000 / 1500 = 40 beats per minute
Therefore, with a distance between two R peaks of approximately 1.5 seconds, the heart rate would be around 40 beats per minute.
There is a more precice way to calculate the heart rate from an ECG signal?
Attention this signal is not filtered. Is better to filter first? And if so, how?
1 个评论
Cris LaPierre
2023-6-15
No need to convert to milliseconds
HeartRate = 60/1.5 % seconds/min * beats/sec = beats/min
回答(1 个)
Cris LaPierre
2023-6-15
See this answer: https://www.mathworks.com/matlabcentral/answers/374766-determining-average-heart-rate-of-ecg-signal
There is also a tool for this in the File Exchange: https://www.mathworks.com/matlabcentral/fileexchange/73049-calculate-heart-rate-from-electrocardiogram-data
2 个评论
Cris LaPierre
2023-6-15
You will need to spend some time finding the appropriate settings for your findpeaks function call. It also wouldn't hurt to filter your signal, though with the prominence of the R peaks, that's proabably not necessary.
You may find this page helpful, too: https://www.mathworks.com/help/matlab/data_analysis/cleandatawithliveeditortasks.html
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