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A passive fixation lead is a type of pacemaker or defibrillator “wire” that is used to send the electrical signal of the device to the heart. It also monitors the electrical signal and activity of the heart. The term “passive” indicates only that the lead is attached to the heart muscle without a mechanism that holds the end of the lead against the heart muscle, most commonly a small corkscrew like device on the end of the lead. Passive leads are held against the heart muscle by the pressure exerted by the leads slight stiffness and shape, or by small tynes that grab the lining structures on the inside of the heart.
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