Do the polls affect elections? Some 1980 evidence

This paper finds that the relatively favorable standing of Ronald Reagan in the preelection polls helped to generate a bandwagon effect in the 1980 presidential election. The models tested here suggest that this effect was most pronounced among voters who had the weakest prior political opinions and hence were most susceptible to suggestion through the media. While the bandwagon effect that is generated is modest, after controlling for an array of other political biases, it is substantial enough to warrant further attention as the dissemination of poll results becomes an increasingly attractive news event.     

The "empty heart" sign

Approximately 15% of victims of instantly lethal central nervous system trauma have an empty or nearly empty heart at autopsy. This article defines and discusses the "empty heart" sign.