Toy Manchester deaths as a result of what we now call Juvenile
Cardiomyopathy have been sporadically reported anecdotally and confirmed
through autopsy for almost three decades in North America.
Since 2005, the Health Committees of the Canadian Manchester Terrier Club (CMTC) and
American Manchester Terrier Club (AMTC) have jointly supported a study
into Juvenile Cardiomyopathy in Toy Manchester
Terriers. The study is being led from the University of Prince
Edward Island's Atlantic Veterinary College by Dr. Etienne Cote,
DVM, DACVIM (Cardiology, SAIM) and Dr.
Shannon Martinson, Diagnostic Pathologist (with assistance as required
from genetic researchers at the University of Pennsylvania). Its
purpose is to determine the characteristics of JCM, investigate whether
screening of breeding stock is possible and explore the eventual
development of a genetic test for the disease.
The term “cardiomyopathy” refers to an inherent disease (pathy)
within the muscle tissue (myo) of the heart (cardio).
Cardiomyopathies can be very serious or even life threatening if they
are severe enough to compromise the heart’s output of blood to the vital
organs. Though there are several types of cardiomyopathy known in dogs,
the arrhythmic disturbance seen in Toy Manchester Terriers appears to be
At present, the study is pursuing three general areas of
Please explore the links above and in the box at right for more
information on JCM and how you can contribute to current research
initiatives. If you have a dog in crisis, please consult our