Please assess the completion status of the following clinical trial:

Trial Title: DATAS: The Dual Chamber & Atrial Tachyarrhythmias Adverse Events Study

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Meet the Class I implantation criteria for single chamber implantable cardioverter defibrillator according to the guidelines (ACC/AHA).~Exclusion Criteria:~* Permanent atrial fibrillation~* Patients without structural heart disease~* Patient meets implantation criteria for dual-chamber pacing (symptomatic sinus node disease, all 2nd Atrio-Ventricular (AV) block \[except asymptomatic Mobitz I\] and all 3rd degree AV block ).~* Patient with previous system implanted (ICD or pacemaker).~* Patients with biventricular stimulation or re-synchronization.~* Patient has a mechanical right heart valve.~* Patient has medical conditions that would preclude the testing required by the protocol, or limit study participation.~* Patient is unwilling or unable to cooperate or give written informed consent, or the patient is a minor and legal guardians refuse to give informed consent.~* Patient is or will be inaccessible for follow-up at the study center.~* Patients who are enrolled or planning to enroll in other clinical trials during the clinical study.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 100 Years
- Healthy Volunteers: f

Study Arms:
- SC true (Type: ACTIVE_COMPARATOR): Single chamber Implantable Cardioverter Defibrillator programmed as a Single Chamber.
- SC sim (Type: EXPERIMENTAL): Dual chamber ICD initially programmed as single chamber (SC simulated) ICD (''SC sim arm'')
- DC true (Type: EXPERIMENTAL): Dual chamber ICD initially programmed as a DDED (''DC true arm'').

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