ECG Data Acquisition

[Himanshu]

Hello LabVIEW Users,
I am trying to acquire ECG signal using a CONTONIUS ANALOG SINGLE CHANNEL INPUT VI in LabVIEW. I would like to know that will I be able to acquire the ECG waveform using this VI or will I need a CRO for this purpose I have not considered CRO because I understand that the heart beats at the rate of 96 beats / min so the signal is very slow varying. If you agree that the ECG can be acquired using the above mentioned VI then I would like to know about the scan rate which will be fit to do so. I must also tell you that the sampling rate for ECG is 300 samples / sec. So it would be nice if some one could please tell me about which VI will be perfect for acquiring the ECG

[JustinBritten]

Greetings,

I would use the "Cont Acq & Chart (buffered).vi" example that ships with LabVIEW. Go to Find Examples in LabVIEW and then browse to "Hardware Input and Output -> DAQ -> Analog Input -> General." This example will continuously acquire data from analog input channel(s) and display the data on a chart. You can even change the chart update mode to a sweep chart to make it look more like an ECG plot. 96 beats a minute is a very slow moving signal. To accurately reproduce the signal we recommend a sampling rate of at least 10 times the frequency of the signal. This corresponds to a sampling rate of only 16 samples per second. Therefore, a scan rate of 300 samples per second is more than adequate.

Regards,
Justin Britten

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