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.
The tast 12 beats of an atrial pacing train at a cycle length of 240 msec aredepicted. The long arrows indicate conduction of pacing stimuti to the ventricles. Beginning with ttie third pacing stimulusshown, the AV time progressively increases until the sixth stimulus blocks.urves relating the ventricular pacing cycle letigth to the VA interval on the last paced beat in patients with eachmechanism of PSVT. The atrial pacing cycle tength is shown on the X axis and the VA intervat on the last paced beat at eachcycte length on the Y axis.