Re: RC: Re: Tieing up

[Truman Prevatt <truman.prevatt@netsrq.com>]

If you look at the fluid dynamics of the problem, then this phenomenon
is well understood and the mathemathics to descirbe it is well
formulated and its prdictions are well tested. In fact even the
fibrillation is predicted as the system goes chaoic- the aperiodic,
unpredictable behavior arising in a system extremely sensitive to
variations in initial conditions and exhibited by phenomena such as
turbulent flow, long-range weather patterns, and cardiac arrhythmias. 

The pipes in which the blood flows are most likely the limiting factor. 
The heart and the pipes in which the blood flows is a closed system and
as such is governed by the same laws that govern fluid flow in oil
refineries, or pumping stations, etc. Pretty simple physics and in fact
there are limites in any system to how fast fluid can flow through it.
It is really the blood flow rate through the body that is the issue
rather than the heart rate. 

T

CMKSAGEHIL@aol.com wrote:
> 
> In a message dated 2/19/00 10:47:15 AM Pacific Standard Time, Tivers writes:
> 
> << Hmm, that sounds as if you are talking about CO relative to HR, not a drop
> in absolute CO. If you will reference the paper, I'll look it up. If you
> don't have the reference, then maybe an estimate of the decade in which it
> was published? And the country of origin?   >>
> 
> Roughly 1980, Tom.  And no, it was an absolute drop in CO due to the
> inability of the heart to refill completely between strokes.  The SV starts
> to drop pretty severely as the HR climbs past a certain point, and when you
> get to the point of fibrillation the SV drops to zero so the CO does, too.
> Since I read the actual paper in English, I'd stick to English-speaking
> countries of origin.  And since the data was collected from multiple species,
> I have a feeling it was in a cardiology publication rather than one that
> stuck primarily to equine research, but maybe not.
> 
> Heidi

-- 
Truman Prevatt
Mystic “The Horse from Hell” Storm 
Buck's Mystic Karma
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