In Osama's case, with that well placed shot to the brain, there is a very good chance that there was no fibrillation. That kind of trauma to the brain often causes immediate "cardiac standstill" due to the resultant pressure and trauma to the brainstem. The electrical (nerve) stimulation that is the pacemaker in the heart just stops. Immediately.
However, if this didn't happen, (and it is possible that it didn't) and his death was a result of exsanguination, his heart would have gradually slowed, gradually going into an ineffective ventricular rhythm and eventually stopped due to lack of blood (oxygen) delivered to the cardiac muscle, much the same as the way someone dies when they have a "heart attack" or myocardial infarction.
I have trouble stretching anemia to fit this situation. Anemia generally refers to the problems with the blood (lack of iron, red cells) and generally doesn't refer to the problems that it causes, such as hypoxia. I guess that is just how I have always viewed it.
However, if this didn't happen, (and it is possible that it didn't) and his death was a result of exsanguination, his heart would have gradually slowed, gradually going into an ineffective ventricular rhythm and eventually stopped due to lack of blood (oxygen) delivered to the cardiac muscle, much the same as the way someone dies when they have a "heart attack" or myocardial infarction.
I have trouble stretching anemia to fit this situation. Anemia generally refers to the problems with the blood (lack of iron, red cells) and generally doesn't refer to the problems that it causes, such as hypoxia. I guess that is just how I have always viewed it.