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There has always been some discussion in SEDRA back when I was on their 
board about how best to give points CRI on a CTR. In SEDRA ride every 
horse goes through the same stress theoretically - which is the theory 
behind CTR. In SEDRA rides all horses have to trot the last 1/4 of a 
mile. All horses are given a CRI at exactly 10 minutes. A few years ago 
the issue of can hand held heart monitors be used - we contacted Kerry 
Ridgeway who adapted the CRI to endurance rides to discuss his thoughts 
on it. Several good veterinarians - including several experienced 
endurance vets and well respected academic vets - had a hand in the 
deliberations that led to the SEDRA CRI scoring. All CRI's are taken 
with a stethoscope for one minute. Basically the SEDRA scoring for CRI 
is one point off for each beat over the initial pulse, that is a 64/64 
or less would get the full points, a 64/68 would lose two points.

We went through a lot of discussion if the CRI was really a valid tool 
for assigning points rather than more than a "pass/fail" and came the 
system used. Different CRT organization have different uses of the CRI. 
UMECTRA uses it one way, the IAHA uses it another way, etc.

In reality I think SEDRA has it right. Personally I don't see any 
difference between the ones below - except the last one 38/39 might lose 
a point but if memory serves me there is a provision for situations like 
this - low pulse within a beat or two - but I don't have the score sheet 
in front of me.

Truman

The Coles wrote:
> I had posted this earlier, but go no responses, so I'm trying again...
> At a recent Limited Distance ride I attended, we were asked a question 
> by the Ride Vet (this was her first "endurance" vetting) regarding CRI's
> We explained to her that the CRI was an indicater of cardiac recovery, 
> and that the reflected values indicated "the fitness of the horse to 
> continue" and that the ideal numerical values we to have the horse 
> recover at, or below, the inital heart rate.
> She then asked how to rate the following CRI's (all CRI's were done at 
> exactly the 10 min "called for pulse" time)
> 58/52
> 44/44
> 38/39
> This brought the discussion around to which one was the best.... The 
> 58/52 shows the best cardiac recovery, while the 44/44 maintained, 
> however the third horse at having an initial HR of 38 showed better 
> pulse down rates. So, she was confused as to how to rate the values 
> for High Vet (yes, we offer High Vet at our small rides in our neck of 
> the woods).
> Given that all other parameters were equal, and based on your experience:
> 1) How would you rate the three?
> 2) What would have been the best way to explain this to her (and yes I 
> know, she should have know the vet manual front and back).
> Thanks
>
> Do not interfeet in the affairs of Dragons, as you probably taste good 
> with ketchup...


--

“He who fights with monsters might take care lest he thereby become a 
monster. And if you gaze for long into an abyss, the abyss gazes also 
into you.” Friedrich Nietzsche, Beyond Good and Evil


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