Please assess the completion status of the following clinical trial:

Trial Title: CarboMedics Top Hat vs St. Jude Medical Regent Valve Comparing Sizing and Hemodynamics

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

Eligibility Criteria:
Inclusion Criteria:~* Patients who are indicated for implant with a mechanical valve prosthesis in the aortic position according to the current practice for valve selection at the center.~Exclusion Criteria:~* Patients \< 18 years of age~* Emergency surgery~* Pre-existing valve prosthesis~* Aortic root replacement~* Active endocarditis

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

Study Arms:
- 1 (Type: ACTIVE_COMPARATOR): CarboMedics Supra-annular Top Hat Valve
- 2 (Type: ACTIVE_COMPARATOR): St. Jude Medical Regent Valve

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