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[RC] Big Heart - Rebecca Hackworth

There are 2 reasons to have a "big heart".

GOOD Big Heart:  Muscles enlarge in size in response to exercise. 
The strength of the beat is usually slower and stronger.

BAD BIG HEART: Muscle enlarges in an attempt to compensate for lack
of oxygen(usually) so gets large to pump more blood faster to get
adequate oxygen so that the tissues do not die off.  Heart rate is
faster but weaker....

In the case of the race horse, I beleive they were also larger than
the average horse of the same size....
Becky and the gang


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