This SciTechDaily item is a reprint of a Georgia Tech news release on School of Physics Professor Flavio Fenton and his continuing research into electric cardio signals and arrhythmias. In a study Fenton co-authored, it was found that alligator hearts don't suffer from fibrillations (irregular heartbeats) in the same way that humans do. (The title of Fenton's research paper? “Defibrillate you later, alligator; Q10 scaling and refractoriness keeps alligators from fibrillation.") The study is also highlighted in this Phys.org story.