Wireless EKG

A MSP430 based ECG/EKG demo system. Two boards: (1) Mobile data acquisition unit, containing MSP430F2274 and CC2420 IEEE 802.15.4 RF module. (2) Control unit with MSP430FG4618 and other CC2420 module, connected to computer through RS-232 (my Dell D520 has native serial port).

Category:

Science & Technology

Tags:

• EKG
• ECG
• Electrocardiogram
• Electrocardiograph
• Heart
• Rate
• BPM
• Medical
• MSP430F2274
• MSP430
• Microcontroller
• Microcontrolador
• RF
• Radio
• Wireless
• IEEE
• 802.15.4
• CC2420
• Embedded
• ZigBee
• Low
• Power
• Agilent
• Scope
• Brasil

[Zahrec]

Nice work! I'm a hobbyist who is making a similar project. Which language did you write the software for the PC in? How do you detect a heartbeat?

[DirceuRodriguesJr]

@Zahrec: Visual C++ 6.0 (I agree, a bit dated comparing with C# and .NET, Phyton, etc., but a working solution). There are several algorithms for detecting heart beats. The majority uses some assortment of signal derivatives and adaptative threshold. Each developer has a preferred.

[AnonyMooseanSquirrel]

Better electrode placement would have contributed to less noise and interference in the signal. Grab an EMT primer at the library or something. You want good skin contact, but also the father apart the leads are, the cleaner the signal. Motion generates noise in the signal as well due to varying resistance between the pad and the skin.

Just wanted to make others aware that there is more to it than there appears to be.

[DirceuRodriguesJr]

The video shows some filtering steps that make the noise amplitude be reduced to negligible levels for experimental purposes. As you can see, this is achieved with an appropriate combination of hardware and software.

[DirceuRodriguesJr]

Do tests with first and second derivatives. So, this signal will be little dependent of EKG base line shifting (DC component).

[Zahrec]

@DirceuRodriguesJr Thanks. I'm writing my software in C#. The serial port is very easy to manage in this language and the .NET framework. One more question: How often do you read a new value from the ECG? I have made a protocol where the software sends a request to the ECG which returns a new value. However, I'm in doubt wheter this is the best way to do it, and if so, how often should one get a nre reading?

[aradioactivedonut]

@AnonyMooseanSquirrel I don't think the point was to demonstrate technical knowledge of medical equipment.

[saadamjad47]

Hey there i wanted to the similar project can u plz send me the block diagram of ur project along with initial proposal report.......i shall be very thankful to you.....W8ing for reply

[wolfmankurd]

Their called limb leads for a reason put them on your limbs....