Device, system and method to ablate cardiac tissue
A method that includes selectively positioning an ablation catheter system at a treatment site; and ablating tissue at the treatment site with the ablation catheter system using a power setting of approximately 90 W applied to tissue for approximately four (4) second increments with a break period of approximately 4 seconds between applications.
1. A method or use, comprising:
selectively positioning an ablation catheter system at a treatment site;
ablating tissue at the treatment site with the ablation catheter system using a power setting of approximately 90 W applied to tissue for a first ablation time of approximately four (4) seconds to achieve a first maximum tissue temperature;
ceasing ablation for a break period of approximately 4 seconds immediately following the first ablation time; and
ablating, immediately after the break period of approximately 4 seconds and using the power setting of approximately 90 W applied to the tissue for a second ablation time of approximately 4 seconds, the tissue at the treatment site with the ablation catheter system to achieve a second maximum tissue temperature.
2. The method or use of claim 1 , wherein the second maximum tissue temperature is approximately 76° C.
3. The method or use of claim 1 , the step of ablating tissue further comprising increasing of temperature between first and second maximum tissue temperature by at least about 13% between first and second ablation applications.
4. The method or use of claim 1 , the step of ablating tissue comprises a point-by-point “kissing” ablation approach causing a continuous and transmural linear lesion line at the atrial wall with minimal over-lapped lesions.
5. The method or use of claim 1 , the step of ablating tissue comprising achieving a lesion depth approximately 40% deeper between first and second ablation applications, the method or use further comprising applying to the treatment site, by a distal end of the ablation catheter system, a contact force ranging between approximately 5-30 grams.
6. The method or use of claim 1 , further comprising:
delivering, by and through an elongated body of the ablation catheter system, a continuous infusion of approximately 8 milliliters/minute of treatment solution when not delivering radiofrequency energy during radiofrequency ablation.
7. The method or use of claim 1 , further comprising:
moving the ablation catheter system approximately 4 millimeter if clinically effective ablation is achieved within 20 seconds as determined by electrogram reduction and/or impedance drop.
8. The method or use of claim 1 , wherein the first maximum tissue temperature is approximately 67.5° C. and the second maximum tissue temperature is approximately 76.3° C.