Her husband, Dave, died of cardiac arrhythmia while they were on a Mexican vacation in 2015, and Sandburg had -LSB-...] (omgchronicles.vickilarson.com)
Furthermore, there are studies (# 1, # 2, # 3, # 4) linking cosmic rays with cardiac arrhythmias in the general population. (spaceweatherarchive.com)
Some regulatory elements are altered in cardiac arrhythmias at the DNA level, for example. (sciencedaily.com)