Kearns was originally slated to start Sunday afternoon's home game against the Phillies but was a late scratch due to the elevated heart rate.
Kearns, 32, is off to a rough on-field start to the 2013 season, too. He's 0-for-10 with three walks (.231 on-base percentage). Justin Ruggiano will get the start in Kearns' absence.
All of that, however, is rather ancillary to Kearns' heart issue. Let's hope it's a temporary issue that is resolved as soon as possible.