Workplaces that have banned smoking are cutting the risk of heart attacks among employees by more than half, a new study shows.

According to Indiana University researchers, there were 59 percent fewer hospital admissions for heart attacks in the 22 months since a workplace smoking ban was implemented in Monroe County, Indiana.

The Monroe County study is the eighth to link smoking bans with improved heart health, according to Cynthia Hallett, the executive director of Americans for Nonsmokers' Rights.

"The results are consistent among all these reports, conducted by different researchers in different communities. The bottom line is smoke-free laws save lives," Hallett said in a statement.