[tranzorZ]

...Huh? I’m medically clueless, does he really have a bomb implanted in him or if an aortic dissection is a real medical problem (problem being an understatement)
and what exactly is it?

[TASMANIANRED]

The intima.. The inner layer of the aorta splits free and tears.

Imagine a hose about 2-3 inches in diameter emptying out your entire volume of circulating blood in about 6 seconds.

Almost a sure death sentence.

[iowamark]

Abdominal Aortic Aneurysm

[60Gunner]

You can find an excellent explanation of aortic dissection, as well as causes, treatment and prognoses, here. He may not have literally had an explosive device implanted in him, but his own body had manufactured something that would have killed him just as quickly. And when the aorta ruptures, it is over in seconds. We had a patient a week previously who was not as fortunate as my patient. But the MD who tended to the patient who died also tended to my patient. And this MD is fantastic.

[null and void]

and what exactly is it?

Imagine you have one of those pressure hoses with the braid between the inner and outer tube. The braid is what keeps the inside tube from swelling up like a balloon and bursting, the outer tube is just there to protect the braid from getting frayed.

Now imagine that the inside tube has a hole. The water quickly pours into the gap that has the braid, the inside tube starts to collapse and the outer tube begins to swell up.

Very soon you are going to have a wet floor...