Please assess the completion status of the following clinical trial:

Trial Title: Oxygen Therapy in Patients With Chronic Heart Failure With Reduced Ejection Fraction

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

Eligibility Criteria:
Inclusion Criteria:~* Patients \> 18 years old.~* Diagnosis and clinic of chronic heart failure with ventricular dysfunction with left ventricular ejection fraction (LVEF) \<40% under optimal medical treatment regardless of its etiology and having presented at least one episode of decompensation (visits to the emergency room, hospitalizations and/or need for intravenous depletive treatment) during the last year.~* Nocturnal desaturation defined as mean SatO2 \<90% and/or Cummulative time (TC) \<90\>22 minutes to nocturnal pulse oximetry done at home.~* Signed informed consent~Exclusion Criteria:~* Chronic lung disease (includes chronic obstructive pulmonary disease with Pulmonary respiratory function (PRF) (forced expiratory volume at one second/forced vital capacity (FEV1/FVC) \<70%), diffuse interstitial diseases, pulmonary hypertension of respiratory).~* Obstructive sleep apnea-hypopnea syndrome (OSAHS) with Apnea hypopnea index (AHI) \> 14.9.~* Previous treatment with oxygen therapy.~* Not agreeing to attend periodic cardiology visits.~* Being part of other clinical studies that contraindicate an intervention.~* Pregnant or breastfeeding women.

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

Study Arms:
- Oxygen Therapy (Type: ACTIVE_COMPARATOR): Participants received nocturnal oxygen therapy (minimum 6 hours) for 6 months.
- No Oxygen Therapy (Type: NO_INTERVENTION): Participants will not received oxygen therapy

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