Please assess the completion status of the following clinical trial:

Trial Title: Metformin as an Upstream Therapy in Atrial Fibrillation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* All individuals diagnosed with Atrial Fibrillation and choosing to undergo a rhythm control strategy at Robert Packer Hospital with a BMI ≥ 27 will be eligible for the study. All subjects must be able to understand and willing to sign a written informed consent document.~Exclusion Criteria:~* Individuals who are already taking metformin or other antidiabetic medications including insulin, have a diagnosis of diabetes, have a known allergy or FDA-labeled contraindication to taking metformin, eGFR below 30 mL/min per 1.73 m2 or other clinical diagnosis of advanced renal disease,, have acute or chronic metabolic acidosis (serum bicarbonate \<22 mEq/L), have a history of significant alcohol use (\>2 drinks/day on average), have a history of hepatic dysfunction (serum bilirubin 1.5X greater than the upper limit of normal), have a history of New York Heart Association (NYHA) Class III or IV heart failure, or are pregnant will be excluded from the trial.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Metformin Group (Type: EXPERIMENTAL): Metformin 500 mg daily initiated 6 weeks prior to scheduled ablation.~Metformin increased to 2000 mg daily (1000 mg twice a day) as tolerated over the initial 3 weeks.
- Control Group (Type: NO_INTERVENTION): Standard of care - ablation only

Based on this trial design, predict the completion outcome and termination type (if applicable).