Ablation Study for Irregular Heartbeat in Atrial Fibrillation Patients
Tests catheter ablation guided by new models in adults with atrial fibrillation.
Plain-language title generated from the registry record
Registry title: Ablation of Human Cardiac Fibrillation Based on Models of Hierarchical Organization of Tissue Excitation
Key facts
- Where
- Madrid, SpainSee the site
Where in Spain
- Hospital Clínico San CarlosMadrid, SpainTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Hospital San Carlos, Madrid
- Trial code
- NCT07390175
- Record updated
- 20 February 2026
- Original description
The mechanisms that maintain persistent atrial fibrillation (AF) in humans remain unknown. In the research project PI18/01268 funded in the previous call for Strategic Action in Health, the group has demonstrated that the hierarchical organization of (i) rotational domains, (ii) frequency domains and (iii) physiological responses to pharmacological provocation with adenosine, allow the identification of domains of high-frequency reentrant activity (hereinafter "DFASI domains") maintainers of AF. As a result, the investigators have developed non-invasive technological models and quantitative indices for the efficient localization of these domains, whose therapeutic approach through ablation has allowed to improve the clinical results of the patients studied, safely without increase in complications (Calvo D et al. Sci Rep. 2025 Dec 16;15(1):43892). Likewise, and in response to the objectives of the PI18/01268 project, the investigators have identified hierarchical organization patterns in human ventricular fibrillation (VF) that indicate the existence of universal fibrillatory mechanisms, opening the door to new therapeutic opportunities (Europace 2022;24[11]:1788-1799).Read full original descriptionShow less
Ablación de la fibrilación Cardiaca Humana Basada en Modelos de organización jerárquica de la excitación Tisular.
The mechanisms that maintain persistent atrial fibrillation (AF) in humans remain unknown. In the research project PI18/01268 funded in the previous call for Strategic Action in Health, the group has demonstrated that the hierarchical organization of (i) rotational domains, (ii) frequency domains and (iii) physiological responses to pharmacological provocation with adenosine, allow the identification of domains of high-frequency reentrant activity (hereinafter "DFASI domains") maintainers of AF. As a result, the investigators have developed non-invasive technological models and quantitative indices for the efficient localization of these domains, whose therapeutic approach through ablation has allowed to improve the clinical results of the patients studied, safely without increase in complications (Calvo D et al. Sci Rep. 2025 Dec 16;15(1):43892). Likewise, and in response to the objectives of the PI18/01268 project, the investigators have identified hierarchical organization patterns in human ventricular fibrillation (VF) that indicate the existence of universal fibrillatory mechanisms, opening the door to new therapeutic opportunities (Europace 2022;24[11]:1788-1799).
Inclusion: Patients over 18 years of age with persistent AF lasting more than 6 months at the time of the experimental protocol (uninterrupted persistent AF) and clinical indication for an AF ablation procedure; or; -Patients over 18 years of age with recurrent VF/VT and poor control with conventional pharmacological measures.
Exclusion: AF/VF/VPT secondary to endocrine-metabolic disorders and/or severe systemic disease (thyrotoxicosis, sepsis, pulmonary thromboembolism, etc.); Contraindications for cardiac catheterization (e.g., intracardiac thrombus); Lack of patient consent to participate in the study; In patients with persistent AF, contraindication for the use of adenosine; Impossibility of remote monitoring using an implantable Holter monitor or implantable defibrillator.