Patient-TAILORed Ablation of Atrial Fibrillation Drivers in Persistent Stages Based on Instantaneous Amplitude and Frequency Modulation Criteria (TAILOR-AF)
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 25
- 试验地点
- 2
- 主要终点
- Freedom from Atrial Fibrillation without antiarrhythmic drugs
研究概览
简要总结
Pulmonary vein isolation (PVI) is still considered the cornerstone of catheter ablation for patients with persistent atrial fibrillation (AF). However, ablation outcomes in patients with persistent AF are suboptimal with high recurrence rates after a single PVI procedure.
Recently, the investigators developed a new strategy, which enables precise identification of the driver regions allegedly responsible for the maintenance of persistent AF outside the pulmonary veins. This approach uses a conventional electroanatomical mapping system and novel single-signal algorithms based on automatic and accurate analysis of the instantaneous amplitude and frequency modulations displayed by atrial signals during AF (iAM and iFM, respectively) to locate the spatiotemporally stable regions that drive persistent AF (leading drivers).
This strategy also enables to identify highly complex substrates in which targeting leading driver regions with catheter-based ablation may not be feasible or could be potentially associated with a significantly higher risk of complications. In such patients, the iAM/iFM maps obtained in the index catheter mapping and ablation procedure will be used to guide an additional patient-specific, minimally invasive surgical ablation approach via thoracoscopy, aiming to completely but specifically target all leading driver regions.
The main objective of the TAILOR-AF study is to identify (via iAM/iFM maps), target and ablate AF leading drivers in patients with symptomatic persistent AF recurrences despite ≥2 previous PVI procedures. The methods include a percutaneous catheter mapping and ablation approach followed by a minimally invasive surgical approach via thoracoscopy, if necessary. As a secondary objective we will study the association of underlying blood biomarkers, atrial imaging and surface ECG parameters, with advanced remodeling stages requiring a surgical approach to target leading driver regions.
This is a single center study (Hospital Clínico San Carlos, Madrid, Spain) that will recruit 25 patients with symptomatic persistent AF episodes despite having been submitted to ≥2 PVI prior procedures. All patients will undergo subcutaneous implantable loop recorder (ILR) implantation to address AF burden 1 month before the ablation procedure and at least 1 year after the ablation procedure. The primary outcome of the study will be AF freedom after one year of follow-up off antiarrhythmic drugs.
详细描述
The study is co-sponsored by the Fundación para la Investigación Biomédica del Hospital Clínico San Carlos (Madrid, Spain) and the Centro Nacional de Investigaciones Cardiovasculares Carlos III (F.S.P.) (Madrid, Spain).
Dr. David Filgueiras-Rama (MD, PhD, affiliation: Hospital Clínico San Carlos) and Dr. Jorge G. Quintanilla (MScEng, PhD, affiliation: Centro Nacional de Investigaciones Cardiovasculares [CNIC]) are Co-Principal Investigators of the study.
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 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients with symptomatic persistent AF (defined as a sustained episode lasting ≥ 7 days) despite ≥2 previous PVI, with or without other atrial anatomical targets isolated in previous procedures (e.g. superior vena cava, coronary sinus or others).
- •AF episodes refractory to ≥1 antiarrhythmic drug (flecainide, propofenone, amiodarone or droneradore) or adverse events related to antiarrhythmic drugs that do not allow long-term drug therapy.
- •Age between 18-75 years old.
- •Patients must be willing and able to comply with all peri-ablation and follow-up requirements.
- •Signed informed consent.
- •Confirmed pulmonary vein isolation in the index (in current protocol) procedure.
排除标准
- •Patients with paroxysmal AF (defined as a sustained episode lasting < 7 days).
- •Patients for whom cardioversion or sinus rhythm will never be attempted/pursued.
- •Patients with AF secondary to an obvious reversible cause.
- •Patients with contraindications to systemic anticoagulation with heparin or coumadin or a direct thrombin inhibitor.
- •Non-sustained AF during the mapping procedure.
- •Severe underlying systemic disease (e.g. dementia, any end-disease stage, sepsis, etc).
- •Severe left atrial dilation (left atrial volume >73 ml/m2).
- •Severe underlying cardiac disease (e.g. left ventricular ejection fraction ≤35%, severe non-corrected valvular disease, severe non-corrected coronary artery disease, hypertrophic cardiomyopathy, other inherited arrhythmia syndromes, severe dilated cardiomyopathy with NYHA functional class III, IV).
- •Hemodynamic instability due to any cardiac or non-cardiac disease.
结局指标
主要结局
Freedom from Atrial Fibrillation without antiarrhythmic drugs
时间窗: After one year of follow-up
Number/Percentage of participants with freedom from Atrial Fibrillation without antiarrhythmic drugs
次要结局
- Freedom from Atrial Tachycardia/Flutter with or without antiarrhythmic drugs(After one year of follow-up)
- Acute termination of Atrial Fibrillation during the procedure/s(During catheter ablation and/or minimally invasive thoracoscopic surgical procedures)
- Freedom from Atrial Fibrillation with or without antiarrhythmic drugs(After one year of follow-up)
研究者
David Filgueiras-Rama
Principal Investigator
Hospital San Carlos, Madrid