I found the "impending doom" term I was looking for in my ACLS manual: angor animi. I'm not sure what the literal translation of that is and would love to hear it.

Another interesting thing about heart attacks: as far as I know, the only gesture recognized as a clinical sign is the clenched fist over the sternum that people tend to display while describing their chest pain, which is named Levine's sign. If you ever enjoyed perusing a dictionary, pick up a medical dictionary and look up "sign" and you'll find all sorts of interesting entries.