The District, true to reputation, is a more expensive place in which to do business--its corporate tax rate of 9.975 percent is well above Maryland's 7 percent and Virginia's 6 percent.
Home > Conditions & Treatments > Arrhythmia > Ventricular Fibrillation. Ventricular fibrillation is a condition in which the heart's electrical activity becomes disordered. When this happens, the heart's ventricles, the lower chambers that pump blood, contract in a rapid, unsynchronized way. The ventricles flutter rather than beat, causing the heart to pump little or no blood. Ventricular fibrillation is life-threatening and requires prompt treatment. Collapse and sudden cardiac death will follow in minutes unless medical help is provided immediately.
This content was last reviewed on 10/23/2014. Ventricular fibrillation is life-threatening. Ventricular fibrillation (v-fib for short) is the most serious cardiac rhythm disturbance. The lower chambers quiver and the heart can't pump any blood, causing cardiac arrest.1  Sudden loss of responsiveness (no response to tapping on shoulders).2  No normal breathing (the victim is not breathing or is only gasping).entricular fibrillation (v-fib for short) is the most serious cardiac rhythm disturbance. The lower chambers quiver and the heart can't pump any blood, causing cardiac arrest.