Please assess the completion status of the following clinical trial:

Trial Title: Prevention of Dysrhythmias on the Cardiac Intensive Care Unit - Does Maintenance of High-normal Serum Potassium Levels Matter

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Scheduled to have isolated CABG surgery~* Patient in sinus rhythm~Exclusion Criteria:~* Age less than 18 years~* Previous history of Atrial Fibrillation, Atrial Flutter and/or Atrial Tachyarrhythmia~* Pre-operative high-degree atrioventricular (AV) block (defined as Mobitz type 2 second degree AV block or complete heart block)~* Pre-operative serum \[K+\] greater than 5.5 mEq/L~* Current/previous use of medication for the purposes of cardiac rhythm management~* Dialysis-dependent end-stage renal failure~* Concurrent patient involvement in another clinical trial assessing cardiac rhythm post-operative interventions~* Unable to give informed consent

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

Study Arms:
- Relaxed control (Type: EXPERIMENTAL): Those randomised to the 'Relaxed' Group will receive potassium supplementation only if their serum potassium drops below 3.6 mEq/L.
- Tight control (Type: ACTIVE_COMPARATOR): Patients randomised to the 'Tight' group will receive potassium supplementation if their serum potassium falls below 4.5 mEq/L (current practice).

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