If someone on a military base with no attacks going on, got a heart attack by watching the news, probably not a war fatality.
But we don't know, so any concrete speculation is probably not very helpful.
I've not seen this claim. The fact that they sent it immediately home for a port call (and had SecNavy visit for a pep talk) when the news of conditions on the Lincoln broke is probably indicative.
https://www.wsj.com/world/middle-east/iran-us-naval-base-bah...
In a completely unrelated development the "worlds best logistics organization" is now having trouble with logistics.
Lose those advantages and even the US military is troubled and the results are what we see today. It cant invade Iran and it cant even bomb or launch an invasion of Houthi territory.
Did i mention the Ospreys which were built because of the Tehran Embassy hostages from the 1980s are grounded today or limited to very short trips because of constant mechanical failures ?
Smokes and mirrors, its not a smart thing to show your enemy your weaknesses.
Were they at that base as a (say) mechanic servicing aircraft engines for flights over the Persian Gulf? Are the only reasons why the planes (and thus him) are there is because of the hostilities with Iran, as otherwise they would be States-side?