Please assess the completion status of the following clinical trial:

Trial Title: Serial BNP Testing for Heart Failure Management

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Eligible subjects must be diagnosed with heart failure and have an abnormal BNP reading.

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

Study Arms:
- BNP Open (Type: None): Subjects treated based on clinical assessment and knowledge of BNP values
- Control (Type: None): Subjects treated based on clinical assessment alone

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