The bioltec® system for CALA catheter ablation consists of the LEONARDO® FPS laser and a coupled pump.

The special feature of the biolitec® laser is the FPS system. With the help of this safety system FPS (Fiber Protection System) the laser switches off automatically if light with a wavelength other than 1064nm is registered during the laser application via the light guide located in the catheter. This prevents overheating damage, such as pump failure or bubble formation. The FPS thus contributes considerably to the safety of the overall system [1, 3]. After elimination of the malfunction, the treatment can be continued without replacing the catheter. By this possibility of saving catheters, the FPS supports the economic aspect.   

Of particular importance here is the histologically proven difference between the laser lesion and the RF lesion, which proves the difference in the arrhythmogenic effect of the methods. Laser lesions show a transmural coagulation necrosis, are clearly recognizable, oval to semicircular and of similar size. The RF lesion, on the other hand, shows areas with coagulation necrosis of different shapes and sizes. In some cases, the endocardium was vaporized or detached, leaving tissue flaps at the lesion margins [2].

Compared to other catheter ablations, laser treatment represents a long-term success rate of 96% due to the low risk, short treatment duration and reduced likelihood of further treatment [3].


  1. H. P. Weber, W. Kaltenbrunner, A. Heinze, K. Steinbach, Laser catheter coagulation of atrial myocardium for ablation of atrioventricular nodal reentrant tachycardia: First clinical experience, European Heart Journal, Volume 18, Issue 3, March 1997, Pages 487–495.
  2. Weber H, P, Heinze A, Enders S, Ruprecht L, Unsöld E: Laser versus Radiofrequency Catheter Ablation of Ventricular Myocardium in Dogs: A Comparative Test. Cardiology 1997; 88:346-352.
  3. Weber, H., Sagerer-Gerhardt, M., & Heinze, A. (2017). Laser catheter ablation of long- lasting persistent atrial fibrillation: Longterm results. Journal of atrial fibrillation10(2), 1588.
  4. J. E. Cummings, A. Pacifico, J. L. Drago, F. Kilicaslan, A. Natale, Alternative Energy Sources for Ablation of Arrhythmias, Pacing and Clinical Electrophysiology 2005; 28:434-443.