With A Fib, this is a disease in which the top of the heart fibrillates. So if we look at a heart, and I'm a neurologist, so I'm gonna look at this sort of basically. I think the hardest two chambers, the Atrium and the ventricle. Blood comes into the atrium, the Atrium squeezes the blood into the ventricle, the ventricles, the big muscle squeezes it and it goes to the whole body. And most importantly, the brain. In A Fib, the top just quivers. It's not beating like it should. It's just quivering. But fortunately we've got gravity on our side, so blood comes down to the ventricle, ventricle squeezes it up and you're good to go. Your heart will beat irregularly, which some people can recognize, but many people don't. What the problem is in this condition is that blood then can sort of sit in the nooks and crannies of that atrium. And when it does that, it coagulates. Clots can form. They can be big clots and they get solid cause they've had some time to form. And then gravity is your worst enemy. Gravity, then the clot comes down and the heart squeezes it up, and it goes into the brain and can cause an ischemic stroke. So A Fib is a big deal, and we'll talk later about how that's treated or prevented.
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