The influence of cavotricuspid isthmus length on total radiofrequency energy to cure right atrial flutter
| Autor: | Bernhard Strohmer, Christiana Schernthaner, Bettina Haidinger, Franz Danmayr, Uta C. Hoppe, Mathias C. Brandt, Johannes Kraus |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty Cavotricuspid isthmus medicine.medical_treatment 030204 cardiovascular system & hematology Right atrial 03 medical and health sciences 0302 clinical medicine Typical atrial flutter Linear regression medicine Humans Heart Atria 030212 general & internal medicine Aged business.industry Anatomic Variation Middle Aged Ablation medicine.disease Surgery Atrial Flutter Catheter Ablation Flutter Female Cardiology and Cardiovascular Medicine business Nuclear medicine Radiofrequency energy Atrial flutter |
| Zdroj: | Kardiologia Polska. 74:237-243 |
| ISSN: | 1897-4279 0022-9032 |
| Popis: | Background and aim: The complexity and success rate of right atrial flutter ablation is highly dependent on anatomical structures. Methods: The study comprised 35 consecutive patients (33–77 years old; 30 men) who underwent ablation of typical atrial flutter. The linear ablation line was measured offline as a surrogate for the cavotricuspid isthmus (CTI) length with the help of a three-dimensional mapping and navigation system (Ensite™). Biophysical parameters, such as total radiofrequency (RF) energy and time of the ablation procedure, were analysed to test the hypothesis that any of these variables show a correlation with the length of the ablation line. Results: Bidirectional isthmus block was achieved in all cases. The isthmus length had a mean value of 32 ± 12 mm with a range of 14–57 mm. The linear regression between the CTI length and the total RF energy was not significant. There was no significant difference in energy (32.281 ± 25.587 vs. 37.136 ± 24.250 W-s, p = NS) or in the total ablation time (759 ± 646 vs. 802 ± 533 s, p = NS) between the group with short (< 29 mm; n = 17) vs. long CTI (≥ 29 mm, n = 18). When comparing different ablation technologies, total RF energy delivered with 8-mm catheter technology (group I) was significantly lower than in patients with cross over from 8-mm to cooled ablation technology (group III) (29.615 ± 12.331 vs. 62.674 ± 28.735 W-s, p = 0.01). The same was true for the comparison between cooled ablation technology (group II) and group III (19.879 ± 13.669 vs. 62.674 ± 28.735 W-s, p = 0.002). Conclusions: The length of the CTI as measured with help of a three-dimensional mapping system may reflect only a weak indicator for the complexity of flutter ablation procedures. The thickness of musculature and specific anatomy of the CTI seem to be the main challenges in performing a linear ablation to achieve bidirectional block. |
| Databáze: | OpenAIRE |
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