Laboratoire de Physiologie, 8 Avenue Rockfeller, 69373 Lyon Cedex 08, France
In 1969 outbred Sprague-Dawley rats were selected for high systolic blood pressure using an indirect plethysmographic technique in pre-warmed unrestrained conscious rats. Three pairs were originally selected, and selection was continued with brother x sister mating. Strain LN was maintained as a normotensive control, and LL as a hypotensive strain. (see Vincent et al 1984, and Vincent and Sassard, 1994 for reviews).