Please assess the completion status of the following clinical trial:

Trial Title: Comparison of Oxygen Interventions and Defibrillator Efficiency

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: FACTORIAL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Atrial fibrillation or -flutter~Exclusion Criteria:~* Patients \<18 years of age~* Pregnancy~* Haemodynamically unstable patients~* Other arrhythmias~* Untreated hyperthyroidism

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

Study Arms:
- 1 (Standard: Oxygen / LIFEPAK 20) (Type: EXPERIMENTAL): 1. Intervention: Cardioversion with a biphasic truncated exponential waveform~2. Intervention: Hyperoxia during cardioversion
- 2 (room air / LIFEPAK 20) (Type: ACTIVE_COMPARATOR): 1. Intervention: Cardioversion with a biphasic truncated exponential waveform~2. Intervention: Normoxia during cardioversion
- 3 (Oxygen / Schiller Defigard 5000) (Type: ACTIVE_COMPARATOR): 1. Intervention: Cardioversion with a pulsed biphasic waveform~2. Intervention: Hyperoxia during cardioversion
- 4 (Room air / Schiller Defigard 5000) (Type: ACTIVE_COMPARATOR): 1. Intervention: Cardioversion with a pulsed biphasic waveform~2. Intervention: Normoxia during cardioversion

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