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.
Single chamber atrial pacing is contraindicated in the presence of AV conduction disorders. Asynchronous pacing is contraindicated in the presence of intrinsic cardiac rhythms. Atrial high-rate burst pacing therapy is intended for use in the atrium only. High-rate burst pacing in the ventricle may result in life-threatening arrhythmias. The temporary pacemaker is MR Unsafe.