Re: what happened to the passengers of flight 93? Â« Reply #17 on: May 06, 2011, 05:33:51 pm Â». There are a lot of different theories on here about what happened. I must say that flight 93 might be the the part of 9/11 that I'm the most undecided on.here are a lot of different theories on here about what happened. I must say that flight 93 might be the the part of 9/11 that I'm the most undecided on.
Atrial fibrillation and atrial flutter are very fast electrical discharge patterns that make the atria contract very rapidly, with some of the electrical impulses reaching the ventricles and causing them to contract irregularly, faster, and less efficiently than normal.
Atrial flutter is a milder form of atrial arrhythmia than is atrial fibrillation; the atrial rate is slower but still â300 activations/min. Often, every second beat is conducted to the ventricles, yielding a heart rate of â150 beats/min. Atrial flutter can progress to atrial fibrillation, and its causes are similar.