<Tr> <Td> Interventricular septal end diastolic dimension </Td> <Td> IVSd </Td> <Td> The thickness of the interventricular septum . </Td> <Td> 8.3 mm, Range 7--11 mm </Td> </Tr> <Tr> <Td> Left ventricular end diastolic posterior wall dimension </Td> <Td> LVPWd </Td> <Td> The thickness of the posterior left ventricular wall . </Td> <Td> 8.3 mm, Range 7--11 mm </Td> </Tr> <Tr> <Td> Left ventricular end systolic dimension </Td> <Td> </Td> <Td> As above but measured during systole . This measurement is not commonly used clinically . </Td> <Td> 16 mm </Td> </Tr> <Tr> <Td> Left atrial dimension </Td> <Td> LA </Td> <Td> </Td> <Td> Range 24--40 mm </Td> </Tr>

Where is the septum of the heart located