To investigate whether a fixed external reference system should be used to most accurately describe regional left ventricular wall motion, we used vectors to analyze a simple model of ventricular contraction. If measured in a fixed external reference system, motion of implanted radiopaque midwall markers may contain translational as well as contractile components. Therefore, comparisons of diff...

The Australian National Poliovirus Reference Laboratory was established in late 1994, as part of Australia’s commitment to the World Health Organization’s (WHO) polio eradication program. The laboratory continues to play a pivotal role in maintaining Australia’s polio-free status through surveillance for cases of acute fl accid paralysis (AFP), the main clinical presentation of poliomyelitis, a...

The Australian National Poliovirus Reference Laboratory at the Victorian Infectious Diseases Reference Laboratory is the World Health Organization designated laboratory for the isolation and testing of poliovirus from clinical specimens within Australia, the Pacifi c Island countries and Brunei Darussalam. Surveillance for acute fl accid paralysis (AFP) within Australia, the main clinical manif...