On Wed, 23 May 2007 10:36:58 -0600, RomeoMike
wrote in
:

There is described an area of myocardial
fibrosis (scarring), which could result from an old infarction or other
causes. He did not have the most healthy of hearts, but the autopsy
report (as you quoted) doesn't prove a cause of medical incapacitation.

That was my interpretation also.

I would suppose that there would be specific markers for myocardial
infarction evident in the blood if he had suffered a heart attack, but
I have no idea if they would be detectable by the time (absent from
the NTSB report) the autopsy was performed.