[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100637846":3},{"organization":4,"armGroups":7,"interventions":14,"overallOfficials":20,"centralContacts":21,"locations":20,"responsibleParty":27,"collaborators":20,"id":31,"slug":32,"hasResults":33,"nctId":34,"briefTitle":35,"officialTitle":36,"acronym":20,"eligibilityCriteria":37,"healthyVolunteers":33,"sex":38,"minAge":39,"maxAge":20,"enrollmentInfo":40,"targetDuration":20,"studyType":43,"phases":44,"briefSummary":46,"conditions":47,"keywords":20,"overallStatus":50,"whyStopped":20,"lastUpdateSubmitDate":51,"lastUpdatePostDateStruct":52,"startDateStruct":55,"completionDateStruct":57,"leadSponsor":59,"locationsCount":20},{"fullName":5,"class":6},"Boston Children's Hospital","OTHER",[8],{"label":9,"type":10,"description":11,"interventionNames":12},"Pace Mapping","EXPERIMENTAL","Patients presenting for clinically-indicated EP study will undergo systematic pace mapping from RV and LV sites according to published PVC\u002FVT localization algorithm schema.",[13],"Diagnostic Test: RV and LV pace mapping",[15],{"type":16,"name":17,"description":18,"armGroupLabels":19,"otherNames":20},"DIAGNOSTIC_TEST","RV and LV pace mapping","Pace mapping at systematic RV and LV sites according to select published VT\u002FPVC localization schema will be performed in study patients.",[9],null,[22],{"name":23,"role":24,"phone":25,"phoneExt":20,"email":26},"Edward T O'Leary, MD","CONTACT","617-355-7833","edward.oleary@cardio.chboston.org",{"type":28,"investigatorFullName":29,"investigatorTitle":30,"investigatorAffiliation":5,"oldNameTitle":20,"oldOrganization":20},"PRINCIPAL_INVESTIGATOR","Edward O'Leary","Physician","100637846","validation-of-ecg-based-ventricular-arrhythmia-localization-algorithms-in-patients-with-repaired-tetralogy-of-fallot-100637846",false,"NCT07607821","Validation of ECG-Based Ventricular Arrhythmia Localization Algorithms in Patients With Repaired Tetralogy of Fallot","Validation of ECG-Based Ventricular Arrhythmia Localization Algorithms in Patients With Repaired Tetralogy of Fallot: A Prospective Pace Mapping Study","Inclusion Criteria:\n\n* Adult patients \\>\u002F= 18 years with repaired tetralogy of Fallot with pulmonary stenosis scheduled for clinically-indicated diagnostic electrophysiology (EP) study.\n\nExclusion Criteria:\n\n* Dextrocardia or mesocardia.\n* Double outlet right ventricle.\n* Tetralogy of Fallot with pulmonary atresia.\n* Contraindication to femoral arterial access.\n* Mechanical aortic prosthesis.\n* Inability to provide informed consent.","ALL","18 Years",{"count":41,"type":42},30,"ESTIMATED","INTERVENTIONAL",[45],"NA","Doctors use patterns on heart rhythm tracings (ECGs) to predict where abnormal heart rhythms originate, but these prediction methods were developed in people with normal heart structure. Patients with repaired Tetralogy of Fallot have hearts that developed differently, and cardiologists do not know if these prediction methods work accurately for them. In this study, the investigators will test whether three commonly used prediction methods work in Tetralogy of Fallot patients by pacing the heart from known locations during an already-scheduled heart procedure and comparing the predicted location to the actual location. Participation adds approximately 15 minutes to the procedure and does not require additional visits. The results will help cardiologists understand whether current methods can be trusted when planning treatments for abnormal heart rhythms in this patient population, or whether new prediction methods need to be developed.",[48,49],"Tetralogy of Fallot (TOF)","Ventricular Tachycardia","NOT_YET_RECRUITING","2026-06-04",{"date":53,"type":54},"2026-06-05","ACTUAL",{"date":56,"type":42},"2026-07",{"date":58,"type":42},"2027-07",{"name":5,"class":6}]