Race horses & large hearts
When they say that a horse as a lot of heart, they may take this literally,
especially for performance race horses. The average horses, heart
weights 8 pounds and famous race horses hearts are many times the average
The first documented evidence that high-performance race horses had enlarged
hearts was Eclipse whose heart was found to
pounds, back in the 1700's.
"Eclipse was cut open by a London surgeon after his death in 1789.
The heart found inside of Eclipse was so much larger than other horses
that it was weighed.
Eclipse’s great heart weighed 14 pounds, more than twice the
normal weight of hearts of horses of that era – approximately six
Today, necropsy results show that the top race horses have super-large
"Today, the normal weight of a horse’s heart is 8.5 pounds.
Even though Secretariat’s heart was not weighed at autopsy, Dr.
Thomas Swerczek, head pathologist at the University of Kentucky,
estimated it at 22 pounds after finding the second-largest heart in Sham
(Secretariat’s Triple Crown rival) and weighing it at 18 pounds."
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