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electrocardiograph

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Roger Tong

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Aug 26, 1986, 6:08:32 PM8/26/86
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Can anyone point me to some references on amplifiers and associated
circuitry that will allow me to monitor pulse rate? if there exists
any off the shelf items that can do this, all the better.

thanks
rogert

Jeff Konopka

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Sep 3, 1986, 4:28:36 PM9/3/86
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The Burr-Brown catalog has some suggestions of how to build EKG amplifiers.
The biggest problem you will encounter will be 60Hz noise.
You are looking for 2mV p-p signals.

but....

If you are going to build your own circuit to display your EKG,
be careful that your circuit is
FULLY ISOLATED
so that you don't go hooking yourself up to a hot 110V line.
Use of batteries will not guarantee isolation from a ground fault if you
interface directly to a CRT or a scope or any other device that gets its
power from the line. Use an isolation amplifier or an optoisolator, and
use a DC/DC converter if you plan to power the amplifier from a line powered
power supply.

If however you are simply looking for something that monitors just heart
rate, those are comercially available from Sears.

Jeff Konopka
Pacesetter Systems Inc.
{sdcrdcf|ihnp4}! psivax!jdk

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