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The aim of the study was to assess the frequency of congenital heart defects in a population of dogs in Poland and to determine which breeds were affected by particular defects. A retrospective study of the medical records of cardiologically examined dogs revealed 301 cases of echocardiographically confirmed congenital heart defects. Dogs with congenital heart defects made up 2.7% of the dogs that underwent a cardiologic examination. The age at diagnosis ranged from 2 weeks to 190 months. Mixed breeds (33 dogs, 11%), Bull Terriers (31, 10%), Boxers (28, 9%), German Shepherds (17, 6%), Yorkshire Terriers (17, 6%), and French Bulldogs (16, 5%) were the most frequently affected breeds. Subaortic stenosis (120 cases, 33.9%), pulmonic stenosis (64, 18.1%), patent ductus arteriosus (59, 16.7%), mitral valve dysplasia (56, 15.8%), ventricular septal defect (24, 6.8%) and tricuspid valve dysplasia (17, 4.8%) were the most frequent congenital heart defects recognized in this study. Isolated congenital heart disease occurred in 258 dogs (86%), while multiple heart defects were noted in 43 dogs (14%). Most (60%) congenital heart defects were recognized in dogs older than 1 year. Early recognition of congenital heart defects is important for better patient care. Collecting information on the frequency of congenital heart defects in particular breeds will be useful in educating breeders and thus in improving the overall health of the breed.
The aim of this study was to determine if atrial natriuretic peptide can be used as an early screening tool for hypertrophic cardiomyopathy in Maine coon cats. Animals: The study was performed in 43 Maine coon cats of both sexes, aged 11 to 92 months. Clinical and echocardiographic examinations were done and proANP serum concentrations were measured every three months over a period of one year (each cat had a total of five examinations). Cats were divided into 3 groups based on echocardiographic results: group 1 – healthy cats, group 2 – cats with unequivocal hypertrophic cardiomyopathy results, group 3 – cats with HCM. The study showed that the concentration of atrial natriuretic peptide correlates with the severity of HCM. A significant increase in serum concentration of this peptide was observed in cats from group 3, but it did not differ significantly between cats from group 2 and the healthy animals (p>0.05). A correlation was also found between proANP and age of the cats (p<0.01, r=0.5578) as well as between the ejection fraction (p=0.0285, r=0.5305) and end-systolic left ventricular diameter (p=0.05, r=0.48) in the affected animals. Atrial natriuretic peptide may be used to help in the diagnosis of advanced stages of HCM in Maine coon cats. Cats with high levels of proANP should be assigned to echocardiographic studies to confirm the disease.
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