Please assess the completion status of the following clinical trial:

Trial Title: CORE: Study to Evaluate the Conducted AF-Response-Algorithm in Patients Suffering From Heart Failure and Atrial Fibrillation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Implant of a Medtronic InSync III Marquis (7279) or later system with Conducted AF-Response~Exclusion Criteria:~* Medical reasons that are adverse to participation in the study and compliance by the patient~* Patients who are enrolled in another study or plan to be enrolled into another study~* Pregnant patients or patients who are possibly pregnant due to an unreliable form of contraception

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

Study Arms:
- Conducted AF-Response Algorithm (CAFR) On (Type: EXPERIMENTAL): CAFR: On~* Level medium~* Max. Rate: 110ppm VSR: Off
- Conducted AF-Response Algorithm (CAFR) Off (Type: ACTIVE_COMPARATOR): CAFR: Off VSR: Off

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