Selox SR / ST / JT features a unique combination – steroid elution and fractal coating ensure optimal threshold behaviour during the entire clinical application period. The original BIOTRONIK fractal coating of all electrically active surfaces ensures reliable sensing of even lowest cardiac potentials, ideal signal-to-noise ratio and optimal interaction with Active Capture Control algorithms. Steroids reduce inflammation processes during the post-operative phase while small geometric stimulation areas enable optimized current conduction between electrode and endocardium.