Myo·car·di·al
adj.
Myo translates to muscle (Ancient Greek: Mus or Mys), while cardia/cardio translates to heart (Ancient Greek: Kardia)
A myocardial rupture is a laceration or the tearing of any part of the heart. It is a quite rare, and usually fatal complication of myocardial infarction (heart attacks).
It accounts for roughly 1/4th of all deaths caused (indirectly) by myocardial infarction.[1]