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. pertaining to an atrium. atrial contraction. contraction of the atrial muscle; plays a part in ventricular filling and opening and closing of the A-V valves.atrial filling. return of blood via the venae cavae and the pulmonary veins to the atria.Too slow a return means inadequate cardiac output, too slow emptying means an increase in central venous pressure and possibly the development of congestive heart failure.trial. pertaining to an atrium. atrial contraction. contraction of the atrial muscle; plays a part in ventricular filling and opening and closing of the A-V valves. atrial filling.