SPironolactONe for the Maintenance of Sinus Rhythm in Patients With Atrial Fibrillation

Overview

Introduction: There is evidence that aldosterone and the activation of its receptor, mineralocorticoid receptor (MR), promote cardiac fibrosis and electrical disturbances. clinical data suggest that MRAs could have positive effects on AF burden, but some inconsistent results have been reported. Therefore, investigators propose to perform a randomized, multicenter, open blinded end-point (PROBE) study to evaluate the efficacy of spironolactone on AF recurrence in hypertensive patients with preserved LVEF. Materials and methods: SPONSoR trial will be a multicenter, landmark, randomized, open blinded end-point (PROBE) trial of the MRA, spironolactone, in 580 hypertensive patients referred for AF with preserved LVEF. 580 patients will be randomized in a 1:1 ratio to either receive oral spironolactone once daily on top of standard therapy or standard therapy alone, started the day of randomization and continued for 12 months. Spironolactone will be start at 25 mg per day initially then titrated to a maximum of 50 mg per day in the absence of contraindication at the 1-month study visit. AF detection will be provided by the use of a wearable optical photoplethysmography (PPG) device (ScanWatch 42mm®, Withings) throughout the duration of the study. These wearables optical PPG devices (ScanWatch 42mm®, Withings). The trial duration is 3 years (24 months for inclusion with 12 months of follow-up; total duration participation for the patient of 12 months).

Introduction: There is evidence that aldosterone and the activation of its receptor, mineralocorticoid receptor (MR), promote cardiac fibrosis and electrical disturbances. clinical data suggest that MRAs could have positive effects on AF burden, but some inconsistent results have been reported. Investigators recently published a systematic review and meta-analysis of both randomized clinical trials (RCTs) and observational studies to examine the effect of MRA use on AF occurrence. Investigators also performed subgroup and meta-regression analyses to explore the source of heterogeneity and identify modifying factors. In this meta-analysis, investigators included 24 studies with a cumulative number of 7,914 patients (median age: 64.2 years, median left ventricular ejection fraction: 49.7%, median follow-up: 12.0 months), with 2,843 (35.9%) of whom received a MRA therapy. Meta-analyses showed a significant overall reduction in AF occurrence in the MRA-treated patients vs the control-groups (15.0% versus 32.2%; OR: 0.55, 95% CI: 0.44-0.70; p\<0.00001), with the greatest benefit regarding recurrent AF episodes (OR: 0.42, 95% CI: 0.31-0.59; p\<0.00001). The MRAs benefit of MRA therapy was consistent in both HF and non-HF patients. Meta-regression analyses showed that results of the studies were significantly associated with higher AF occurrence rate in the control-groups. Therefore, investigators propose to perform a randomized, multicenter, open blinded end-point (PROBE) study to evaluate the efficacy of spironolactone on AF recurrence in hypertensive patients with preserved LVEF. Materials and methods: SPONSoR trial will be a multicenter, landmark, randomized, open blinded end-point (PROBE) trial of the MRA, spironolactone, in 580 hypertensive patients referred for AF with preserved LVEF. After assessment of inclusion and non-inclusion criteria and following collection of the patient's written consent, 580 patients will be randomized in a 1:1 ratio to either receive oral spironolactone once daily on top of standard therapy or standard therapy alone, started the day of randomization and continued for 12 months. Spironolactone will be start at 25 mg per day initially then titrated to a maximum of 50 mg per day in the absence of contraindication at the 1-month study visit. All subjects are to be treated using the most adapted therapy based on international guidelines, including antiarrhythmic drugs and betablockers. Investigators and patients will be aware of study group allocation. The randomization will be stratified on centers for administrative reason and to allow center-withdrawal and on age (\<70 years old and ≥ 70 years old). All randomized subjects will be followed even if study drug is discontinued ahead of schedule, except in the case that the subject refuses to participate further in the study. After randomization, patients will be follow-up with study visits at months 1, 6, and 12, including systematic 12-leads ECG and serum electrolytes measurements. AF detection will be provided by the use of a wearable optical photoplethysmography (PPG) device (ScanWatch 42mm®, Withings) throughout the duration of the study. These wearables optical PPG devices (ScanWatch 38mm®, Withings) allow us to detect effectively AF without side effects encountered with other technologies (cables, cutaneous reactions to patches, subcutaneous implantation ...). This continuous pulse monitoring will allow us to be optimal in AF detection. Blood samples will be collected at baseline to measure aldosterone level and then will be stored in the Caen University CRB for later use in ancillary studies. The trial duration is 3 years (24 months for inclusion with 12 months of follow-up; total duration participation for the patient of 12 months). Patients will begin the treatment (spironolactone on top of standard therapy or standard therapy alone) at V0 and continue until V3.