Key result
Increasing pacemaker lead tip diameter greatly reduces ease of extraction in an animal model.
Why the study?
Extraction of chronically implanted transvenous pacemaker leads is often difficult due to fibrous sheaths and nonisodiametric lead portions, complicating removal and risking cardiac injury.
Does isodiametric pacemaker lead design improve the ease of extraction compared to nonisodiametric design in animal models?
Does isodiametric pacemaker lead design improve the ease of extraction compared to nonisodiametric design in animal models?
Designing pacemaker leads to be isodiametric throughout their entire length greatly enhances the ease of chronic extraction.
Answers are grounded in this paper and cite their sources.
May inform safer extraction techniques for complex leads; human studies needed before clinical consideration.
Extracting permanently implanted transvenous pacemaker leads is often difficult because a fibrous sheath tends to trap the lead at various points along its course. Because many leads have bulbous or nonisodiametric portions, extraction may be rendered even more troublesome, because it is difficult to pull the larger portion through the narrow areas of the sheath. Furthermore, forceful extraction may have dire consequences, such as cardiac laceration. A study was undertaken in animals to evaluate the effect of lead isodiametricity on lead extraction. The results show that any increase in the diameter of the lead tip greatly reduces the ease of its removal. Consequently, leads designed to be isodiametric throughout their entire lengths will greatly enhance their removability.
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Parsonnet et al. (1997) studied Chronically implanted pacemaker leads. Nonisodiametric lead design vs. Isodiametric lead design was evaluated on Ease of lead removal. Any increase in the diameter of the pacemaker lead tip greatly reduced the ease of its removal in an animal model.
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