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Fig. 5 | BMC Veterinary Research

Fig. 5

From: Combined double chambered right ventricle, tricuspid valve dysplasia, ventricular septal defect, and subaortic stenosis in a dog

Fig. 5

Necropsy findings from a male, 1.2-year-old Golden Retriever dog. a The right lateral exterior aspect of the heart, demonstrating a severely enlarged right atrium. b The tricuspid valve apparatus seen from the opened right atrium, demonstrating a thickened septal leaflet (asterisk). An arrowhead shows pectinate muscles. c A large fibromuscular band (asterisk) seen from the distal RV chamber, divides the RV cavity and includes an oval ostium at its dorsal aspect, communicating between this and the other, proximal RV compartment (arrow). The ostium is seen from the compartment that contains the outflow tract structures. d The communicating ostium between the two RV compartments (arrow) seen from the RA, through the compartment that contains the inflow structures, including the tricuspid annulus and leaflets (asterisks). An arrowhead shows right atrial pectinate muscles. LA, left atrium; LV, left ventricle; RA, right atrium; RV–d, right ventricular distal chamber. Each small square represents 1 cm × 1 cm

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