cor triatriatum dexter
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Cor triatriatum dexter. James Montgomery, DVM October 19, 2009. Chester Acc #76718. 2 yo M Lab retriever Heart murmur, lethargic. Cor Triatriatum. Sinister and/or dexter Reported in both cats and dogs Dexter results from persistence of the embryologic right sinus venosus valve - PowerPoint PPT PresentationTRANSCRIPT
COR TRIATRIATUM DEXTER
James Montgomery, DVMOctober 19, 2009
Chester Acc #76718 2 yo M Lab retriever Heart murmur, lethargic
Cor Triatriatum Sinister and/or dexter Reported in both cats and dogs Dexter results from persistence of the
embryologic right sinus venosus valve The right atrium is partitioned by a diaphragm
Typically, the caudal vena cava and fossa ovalis are in the caudal chamber and the coronary sinus and right AV valve are in the cranial chamber
Perforate or imperforate Imperforate generally shunt to azygous or vertebral
venous circulation
Cor triatriatum dexter
Cor triatriatum dexter Extremely uncommon Age at diagnosis range in lit from 8 weeks
to 7 years Reported breeds: chow chow, cocker
spaniel, English bulldog, German shepherd dog cross, German short-haired pointer, golden retriever, greyhound, rottweiler, and mixed breed dog
Should be considered as a differential diagnosis in young dogs with abdominal distension and ascites
Clinical Findings Usually have evidence of congestion in
the caudal half of the body – ascites, but do not demonstrate jugular distension or a murmur
Prominent cutaneous abdominal veins
Hepatomegaly
Diarrhea from malabsorption
Diagnostics Thoracic radiographs: tend to be
unremarkable with the exception of caudal vena caval enlargement
ECG: generally normal
Diagnosis usually by echocardiography or selective angiography
Selective AngiogramHunter Acc # 119523
Treatment
Balloon Valvuloplasty
Surgical resection or bypass of the obstruction
Chester: Acc # 76721
References Duncan RB, et al. Cor triatriatum dexter
in an English bulldog puppy: case report and literature review. J Vet Diagn Invest 11:361-5 (1999).
Oyama MA, et al. Congenital heart disease. In Ettinger SJ, Feldman EC, eds. Textbook of Veterinary Internal Medicine, 6th ed (St. Louis, MO: Elsevier Saunders, 2005) pp. 1012-13.