Ann Pediatr Card Close
 

Figure 1: The images show the short axis views of the left (left hand panel) and right (right hand panel) atrioventricular junctions of the normal heart as seen from above, having opened the atriums with a cut parallel to the atrioventricular junctions. They show how, in the morphologically right atrium (right hand panel), the pectinate muscles within the the appendage extend all round the vestibule of the tricuspid valve. In the morphologically left atrium, in contrast (left hand panel), the pectinate muscles are confined within the tubular appendage, so that the inferior wall of the atrium is smooth

Figure 1: The images show the short axis views of the left (left hand panel) and right (right hand panel) atrioventricular junctions of the normal heart as seen from above, having opened the atriums with a cut parallel to the atrioventricular junctions. They show how, in the morphologically right atrium (right hand panel), the pectinate muscles within the the appendage extend all round the vestibule of the tricuspid valve. In the morphologically left atrium, in contrast (left hand panel), the pectinate muscles are confined within the tubular appendage, so that the inferior wall of the atrium is smooth