If I were able to implement high availability (HA) technology in HIS, I think its benefit not only for patients but also healthcare workers themselves and stakeholders involved.
First, patients can get prompt services provided by hospital uninterruptedly. By having HA hospital can also operate all the systems without downtime regardless how many patients were at that time. In addition, hospitals can be able to serve for unexpected circumstances to make sure that information are ready and available for those who need it.