Chaos is the disorder of a dynamical system but it is not completely unpredictable.   Researchers are convinced that locating the origin of chaos and watching it develop might allow science to predict, and perhaps counteract, outcomes.

Like having a heart attack. 

Writing in in the journal CHAOS, researchers say chaos models may someday help model cardiac arrhythmias (abnormal electrical rhythms of the heart) and help to understand the behavior of ventricular fibrillation, a severely abnormal heart rhythm that is often life-threatening, in order to mitigate it.