[QUOTE=richardw;139679868]Sorry, I missing something here. A diacritic notch is a point in a graph of aortic blood pressure where the pressure drops deeply. I never heard the term used as if it were an anotomical location.

Clarification?[/QUTE]

The dicrotic notch is a slang term used by some
for the u shaped notch located on top of the sternum,
Nestled between the jugular veins and carotid arteries..
A hit in this spot will result in RAPID LOSS OF BLOOD PRESSURE,
massive bleeding and central nervous/spinal cord damage..
So that is the connection.. Sorry for the confusion..

It is also the spot in which you should start a tracheotomy vertical incision..
Learned that watching medic do procedure in the field in Vietnam Nam ..