Date: Fri, 20 May 2011 17:37:25

Author: Martin Simon

Subject: Re: Biophysics Demos?

Post:

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Good find. It indicates the wiggles are there in a more
professional version.

Marty

On 5/20/2011 2:29 PM, William Maddox wrote:
> From: WC Maddox
>
> Ballistocardiograph operation
>
> From this source:
> http://www.time.com/time/magazine/article/0,9171,897754,00.html
>
> The principle of the heart's "kick" is as simple as the thrust of a
> rocket: with each beat, blood rushes upward and strikes the aortic
> arch (where the great artery curves downward). The impact is great
> enough to give the whole body an upthrust. Almost simultaneously,
> acceleration of the blood directed downward by the aortic arch adds to
> the upthrust. When the descending blood slows down, there is a rebound
> effect which gives the body a downthrust, about half as intense as the
> earlier upthrust.
>
>
>
> End Message
>
>
>
>
>

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Good find. It indicates the wiggles are there in a more
professional version.

Marty

On 5/20/2011 2:29 PM, William Maddox wrote:



From: WC Maddox

Ballistocardiograph operation

From this source: http://www.time.com/time/magazine/article/0,9171,897754,00.html

The principle of the heart's "kick" is as simple as the
thrust of a rocket: with each beat, blood rushes upward and
strikes the aortic arch (where the great artery curves
downward). The impact is great enough to give the whole body
an upthrust. Almost simultaneously, acceleration of the blood
directed downward by the aortic arch adds to the upthrust.
When the descending blood slows down, there is a rebound
effect which gives the body a downthrust, about half as
intense as the earlier upthrust.


End Message










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