Typical Atrial Flutter, Ablation Index and Point by Point Ablation
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 400
- 试验地点
- 1
- 主要终点
- First pass block of the cavo tricuspid isthmus
研究概览
简要总结
The Ablation of the typical atrial flutter can be considered substantially anatomical, the investigators want to test a protocol that foresees the use a lesion index (AI) and that respects the Inter-Lesion Distance (ILD) ≤ 6 mm on the cavo-tricuspid isthmus (CTI) The investigators want to prove how the introduction of a lesion index combined with the continuity of lesion can allow a "first pass block" of the CTI decreasing total Radio-Frequency (RF) times
详细描述
The Ablation of the typical atrial flutter can be considered substantially anatomical, the aim of the study is to test a protocol that foresees the use a lesion index and that respects the Inter-Lesion Distance ≤ 6 mm on the cavo-tricuspid isthmus to prove how the introduction of a lesion index combined with the continuity of lesion can allow a "first pass block" of the CTI decreasing total Radio-Frequency times With the aim of reducing the use of the fluoroscopy and ionizing radiations, an anatomical map of the right atrium will be reconstructed with a mapping catheter in all patients, and a 10-pole catheter will be placed in the coronary sinus.Then, the anatomy of the isthmus will be precisely defined with a catheter equipped with a force sensor ,identifying the tricuspid valve as the initial point of ablation and the inferior vena cava- right atrium junction as the end point of the line.Once the reconstruction has been completed, the ablation phase will start. Considering the values already validated for the left atrium, the protocol foresees the point-by-point ablation with the use of AI ≥ 500 and ILD≤ 6 mm.
The Visitag setting will be the following:
- Respiration Adjustment;
- Catheter Position Stability Min. Time = 3 sec, Max. Range = 5 mm;
- Force Over Time Time = 30% Min. Force = 4 gr. The power can be set between 35 and 40 watts. At the end of the isthmus ablation, line block will be evaluated by proximal CS pacing, acquiring at least 3 distinct points from the ablator catheter around the tricuspid annulus ,typically ostium of coronary sinus (CS), lateral tricuspid annulus and a point more proximal to the line of ablation.
Once this phase has been completed, 20 minutes of waiting time has to be considered. After this waiting time the block of the isthmus will be validated again with the same protocol described above.
Primary Endpoint -Anatomical first Pass block of the CTI.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 90 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- •Previous ablation for atrial flutter
- •Atrial flutter secondary to electrolyte imbalance, thyroid disease or to a reversible or non-cardiac cause
- •severe anemia,
- •sepsis in progress
- •Bypass procedure with coronary arterial artery in the last three months
- •Pending cardiac transplantation or other cardiac surgery
- •Pregnant or breastfeeding women
- •Acute disease or active systemic infection or sepsis
- •Documented left atrial thrombus
- •Unstable angina
- •Uncontrolled heart failure
- •Life expectancy of less than 12 months
- •Registration in any other study evaluating another device or medication
- •Presence of intramural thrombi, tumor or other anomalies that preclude the introduction of the catheter into the vein system
结局指标
主要结局
First pass block of the cavo tricuspid isthmus
时间窗: 9 months
Validation of the bidirectional block by pacing on the coronary sinus after completing the first line of the ablation
次要结局
- radiofrequency time of application(9 months)
- Procedural time(9 months)
- Near zero x ray(9 months)
研究者
Graziana Viola
Medical Doctor
Ospedale San Francesco