A novel self-anchoring endocardial electrode using an ejectable dart demonstrated stability and acceptable electrical characteristics in animal models and one refractory clinical case.
Supports further testing in refractory cases; leaves open confirmation of safety and efficacy in larger trials.
We describe a new electrode which uses the self-anchoring property of an ejectable dart to remain in permanent contact with the right ventricular myocardium. In longrange animal experiments, there were neither disloca tions nor mechanical failures. Both acute and chronic threshold measure ments, as well as sensing characteristics, remained acceptable. The experi mental lead was applied in a clinical case refractory to treatment by other electrodes. The application of this dart-electrode appears to be indicated when elec trode instability occurs. Further well-controlled clinical trials appear to be necessary before it could be recommended for routine clinical use for all patients requiring transvenous pacemaker implants.
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Robicsek et al. (1981) studied this question.
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