The best hospitals in the U.S. have been named by the Joint Commission.

More than 400 institutions in 45 states made the Top Performers on Key Quality Measures list.

The hospitals all scored 90 percent or more and are recognized for their performance in the areas of heart attack, heart failure, pneumonia, surgical and children's asthma.

Today, the public expects transparency in the reporting of performance at the hospitals where they receive care, and The Joint Commission is shining a light on the top performing hospitals that have achieved excellence on a number of vital measures of quality of care, Joint Commission president Mark R. Chassin said in a statement.

Still, improvements are needed.

Of the 405 hospitals listed, only seven were recognized for their service in the area of children's asthma.

The study noted that only 60.5 percent of hospitals achieved 90 percent or better in the area of providing fibrinolytic therapy to heart attack patients within 30 minutes of their arrival.

Also, only 77.2 percent of hospitals achieved 90 percent or better in the area of providing antibiotics to certain pneumonia patients.

By following evidence-based care processes, hospitals can improve the quality of the care they provide and meet national mandates regarding performance, Chassin said.