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Symptoms: Heart murmur, particularly a continuous heart murmur in puppies or young dogs,, chronic coughing, breathing difficulties, weakness, exercise intolerance, congestive heart failure. More often seen in females than males.
Treatment Options: Surgery to close the vessel at the earliest time possible after diagnosis. Dogs that have had corrective surgery for PDA have been able to lead relatively normal lives.
Known Mode of Inheritance: Unknown in Cardigans. Identified as a proven inherited, but complex issue in other breeds.
Age of onset: birth
Other Breeds: yes, the GSD, Maltese, Cocker Spaniel, Poodle, Pomeranian, and Shetland Sheepdog have been identified at higher risk.
Incidence in Cardigans: Uncertain. Incidence may be relatively low, but it has been reported in the breed.
Other breeds: yes
Active?: yes, but currently only for Shetland Sheepdogs.
(PDF format) Patent Ductus Arteriosus study (Shelties only
Published papers and Articles:
Etiology of patent ductus arteriosus in dogs.
Registry: Not specifically for this disorder, but the OFA does have a Cardiac Database which is currently being improved.
Link to read the OFA's Cardiac Database Notice
Links to register: OFA Congenital Cardiac Application (PDF)
DNA Tests Available: no
Yahoo Group: Dogheart
Purdue University Info Page on PDA