2007
DOI: 10.5326/0430221
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Incomplete Atrioventricular Canal Complicated by Cardiac Tamponade and Bidirectional Shunting in an Adult Dog

Abstract: An incomplete atrioventricular (AV) canal with bidirectional shunting and cardiac tamponade in a 6-year-old dog was initially diagnosed echocardiographically as a common atrium. The dog failed to respond to medical therapy and was euthanized. Upon necropsy, the defect was confirmed as an incomplete AV canal. A mechanism for the potential sequence of clinical events demonstrated in this dog is proposed.

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Cited by 3 publications
(5 citation statements)
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“…Additionally, abnormalities of the tricuspid valve similar as to what observed in the presented case were observed in cats, where a large leaflet of the valve was more prominent [7]. Dogs were reported mainly with incomplete AVCD and, strikingly, in much lesser proportion than cats [2][3][4][10][11][12][13][14]. In horses, only complete AVCD cases were described [15][16][17][18].…”
Section: Discussionsupporting
confidence: 64%
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“…Additionally, abnormalities of the tricuspid valve similar as to what observed in the presented case were observed in cats, where a large leaflet of the valve was more prominent [7]. Dogs were reported mainly with incomplete AVCD and, strikingly, in much lesser proportion than cats [2][3][4][10][11][12][13][14]. In horses, only complete AVCD cases were described [15][16][17][18].…”
Section: Discussionsupporting
confidence: 64%
“…A diagnosis of AVCD is performed based on cardiovascular examination using imaging methods like radiography, ECG, and echocardiography. Generally, radiography reveals cardiomegaly, especially regarding the right atrium, both ventricles, and a pronounced pulmonary artery [4,14]. The ECG commonly shows QRS changes compatible with conduction abnormalities, especially bundle branch blocks [3].…”
Section: Discussionmentioning
confidence: 99%
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“…Endocardial cushion defects have been reported in both cats and dogs [126,[134][135][136], without any apparent breed or sex predisposition. In our experience, this disease is more frequently seen in cats than in dogs.…”
Section: Endocardial Cushion Defectmentioning
confidence: 97%
“…The predominant echocardiographic features of complete endocardial cushion defect include absence of atrioventricular septum and valvular malformation, a cleft anterior mitral leaflet, or a common atrioventricular valve [135]. The presence of a single common atrioventricular valve is well documented using the left parasternal apical 4 chambers and oblique views (Figure 19-62).…”
Section: Echocardiographic Aspects Bidimensional Echocardiographymentioning
confidence: 98%