Please assess the completion status of the following clinical trial:

Trial Title: Influence of Sacubitril/Valsartan on Autonomic Cardiac Nervous System in Heart Failure Patients: an Exploratory Study

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

Eligibility Criteria:
Inclusion Criteria:~* Patients with symptomatic severe heart failure with reduced ejection fraction (LVEF ≤40%,)~* Age \> 20 years~* Consent capacity~* Sinus rhythm~* Suitable for a drug conversion from AT1/ACE inhibitors to sacubitril/ valsartan~Exclusion Criteria:~* Age \< 18 years~* Atrial fibrillation~* Pregnancy~* Lack of consent capacity~* Contraindications for a therapy with sacubitril/ valsartan

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 99 Years
- Healthy Volunteers: f

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