Sometimes the atria begin to fibrillate with no known trigger.

At this point, Nick is starting to fibrillate due to all of the ant bites.

There had been some damage to his nervous system above the waist, and his heart could fibrillate on occasion.

"If the eddies can't develop, then the atrium can't fibrillate."

"She didn't fibrillate but she did have premature ventricular contractions.

Consider the fear when it starts to fibrillate, and then the pain, and afterward, you'll never trust that tired pump again.

Angelique looked up, ready to fibrillate.

The heart may fibrillate at first - this occurs because the cardiac muscle fibres are not contracting synchronously.

And we tell them if you are going to use coke, maybe your heart will fibrillate and you will die.

Not provisional or erasable, they don't downsize in a stumbling economy or fibrillate with the collective cacophony from Washington.

He would lie in his cell at night and his heart would fibrillate with terror should he not succeed in this.

She had a convulsion, her respiration grew slow and shallow, her heart began to fibrillate, and she passed inexorably into coma.

Without them, the economy would fibrillate: Polish carpenters build housing, Filipino nurses staff hospitals, Hungarian nannies tend babies.

In atrial fibrillation, erratic electrical impulses in the upper chambers of the heart (atria) cause those chambers to fibrillate, or quiver.

If not corrected quickly, the ventricles can fibrillate causing VF (ventricular fibrillation) - leading to sudden cardiac death (SCD).

In a 2003 study at the University of Missouri, Taser found that a shock roughly 20 times that of the X26 caused a healthy, anesthetized 85-pound pig to fibrillate.

About 680 Americans a day who have heart attacks go into sudden cardiac arrest, in which the heart stops beating and begins to fibrillate - quivering, in a common description, "like a bag of worms."

Sudden cardiac arrest is a condition set off by abnormal electrical signals that throw off the normal beating of the heart, causing the heart's main pumping chamber, the left ventricle, to fibrillate, or go into spasmodic contractions.

But a smaller group of doctors, many in Europe, have favored a less aggressive strategy - controlling the rate and allowing the atria to continue to fibrillate - even though that strategy was conceptually less appealing than rhythm control.

It was while *Wait was in this position that his heart began to fibrillate - which is to say that its fibers began to twitch in an uncoordinated manner, so that the march of the blood in his circulatory system was no longer orderly.