7/26/2013

Rigo, the Melbourne Zoo's beloved 42-year-old western lowland gorilla, has died as a result of hypertrophic cardiomyopathy, according to tissue samples collected during his autopsy. Heart trouble is common in captive, older gorillas, and a U.S. group is studying cardiac-related mortality in the species. Rigo's cardiac ultrasounds in 2007 and 2009 were normal and he didn't exhibit any overt symptoms of disease, according to Melbourne Zoo veterinarian Michael Lynch.

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