Atrial Fibrillation Clinical Trial
— SubstrateAFOfficial title:
Investigation of Substrates Associated With the Recurrence of Atrial Fibrillation After PV Cryoablation
NCT number | NCT03587181 |
Other study ID # | 01-04/18 |
Secondary ID | |
Status | Completed |
Phase | |
First received | |
Last updated | |
Start date | April 3, 2017 |
Est. completion date | October 30, 2019 |
Verified date | January 2020 |
Source | National Research Center for Preventive Medicine |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
The two main mechanisms for atrial fibrillation (AF) recurrence after cryoablation include
Pulmonary vein (PV) reconnection and the presence of non-PV associated arrhythmic focuses.
The aim of this study is to investigate the prevalence of each mechanism and if biomarkers
may be used to predict of these events.
Eighty patients with paroxysmal or persistent AF will undergo PV isolation with cryoablation
followed by loop recorder implantation. Patients in whom atrial tachyarrhythmias recur during
12 months follow-up (outside of the 3-month post procedure blanking window) will be offered a
second electrophysiology study (EP) study to assess PV isolation and non-PV focuses and
further ablation performed as required.
At baseline blood samples will be taken to investigate the correlation between specific
biomarkers and both the incidence and type of recurrence. The correlation between recurrence
of atrial tachyarrhythmias due to non-PV associated arrhythmic focuses and elevated baseline
levels of NT-ProBNP, CRP, TNF, MMP1 will be pre-specified.
40 consecutive patients will have a biopsy taken from the intraventricular and interatrial
septum to investigate the correlation between myocardial inflammation, the presence of
fibrosis and recurrence of atrial tachyarrhythmias. Correlation between biomarkers of
inflammation and biopsy-proven myocardial inflammation or fibrosis will be assessed.
Status | Completed |
Enrollment | 100 |
Est. completion date | October 30, 2019 |
Est. primary completion date | October 30, 2019 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years to 80 Years |
Eligibility |
Inclusion Criteria: • Patient with paroxysmal/persistent atrial fibrillation (EHRA scale 2b-4) Exclusion Criteria: - prior interventions for AF - permanent AF - contraindications to oral anticoagulation or heparin - chronic kidney disease requiring dialysis - untreated hypo- or hyperthyroidism - breast feeding - pregnancy - chronic kidney disease requiring dialysis - decompensated heart failure - stroke within the last 3 months - myocardial infarction within the last 3 months - Percutaneous coronary intervention or Coronary Artery Bypass Grafting within the last 3 months - active myocarditis - artificial valve replacement surgery - severe mitral or aortic stenosis - coronary artery disease requiring revascularization - heart transplant |
Country | Name | City | State |
---|---|---|---|
Russian Federation | National Research Center for Preventive Medicine | Moscow |
Lead Sponsor | Collaborator |
---|---|
National Research Center for Preventive Medicine | I.M. Sechenov First Moscow State Medical University |
Russian Federation,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Atrial tachyarrhythmia recurrence | Atrial tachyarrhythmias recurrence by ECG, Holter monitoring or loop recorder after 3 months of blanking period | 1 year | |
Secondary | The prevalence of PV reconnection and non-PV focuses as substrate of atrial tachyarrhythmia after cryoablation | 1 year | ||
Secondary | The difference in baseline NT-ProBNP levels between those patients with recurrence of atrial tachyarrhythmias due to non-PV associated arrhythmic focuses and those without at 12 months | 1 year | ||
Secondary | The difference in baseline CRP levels between those patients with recurrence of atrial tachyarrhythmias due to non-PV associated arrhythmic focuses and those without at 12 months | 1 year | ||
Secondary | The difference in baseline TNF levels between those patients with recurrence of atrial tachyarrhythmias due to non-PV associated arrhythmic focuses and those without at 12 months | 1 year | ||
Secondary | The difference in baseline MMP1 levels between those patients with recurrence of atrial tachyarrhythmias due to non-PV associated arrhythmic focuses and those without at 12 months | 1 year | ||
Secondary | The difference in baseline NT-ProBNP levels between those patients with recurrence of atrial tachyarrhythmias and those without at 12 months | 1 year |
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