The following terms refer to this characteristic of muscle contraction: The origin of the muscle is the muscle end that attaches to the stationary structure, usually a bone or a bony structure. The insertion of the muscle is the muscle end that attaches to the moving structure.
Defibrillators vary in price. Depending on what features you are looking for, defibrillators currently range from just over $1000 up to more than $20,000 for the expensive top of the range defibrillators used by paramedics, medical teams and hospitals. Prices also vary for larger quantities.
Unsynchronized cardioversion (defibrillation) is a HIGH ENERGY shock which is delivered as soon as the shock button is pushed on a defibrillator. This means that the shock may fall randomly anywhere within the cardiac cycle (QRS complex). Unsynchronized cardioversion (defibrillation) is used when there is no coordinated intrinsic electrical activity in the heart (pulseless VT/VF) or the defibrillator fails to synchronize in an unstable patient.