This single arm study is designed to measure impedance signals from implanted leads in different positions in the heart. Signals obtained at different pre specified position are compared to each other to determine the robustness of the acquired measurements.

Bioimpedance measurements

Acquisition of absolute and imaginary bioimpedance signals from electrodes of known location within the heart at different input current frequencies. Pacing is performed from Three different electrodes during acquisition of bioimpedance acquisition forming Three different groups. Wavelets of the signals are analyzed within each Group and compared within the Group and between the Groups. Optimization is achived when a discrimination factor that is calculated is improved.