Please assess the completion status of the following clinical trial:

Trial Title: Postoperative Tolvaptan Use in Left Ventricular Assist Device Implantation Patients

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:~* Hospitalized patients with American College of Cardiology (ACC) and the American Heart Association (AHA) Stage D heart failure and plan to undergo LVAD implantation~* Age greater than or equal to 18 years old~Exclusion Criteria:~* No plan for LVAD implantation~* Age less than 18 years old

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

Study Arms:
- tolvaptan (TLV) (Type: None): LVAD recipients with post-operative hyponatremia (Na \< 135 mEq/L). Eligible patients took tolvaptan 15 mg daily as part of a routine care treatment plan.
- no tolvapton (no-TLV) (Type: None): LVAD recipients with post-operative hyponatremia (Na \< 135 mEq/L). Eligible patients did not take tolvaptan as part of routine care.

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