Please assess the completion status of the following clinical trial:

Trial Title: Clinical Value of Left Atrial Appendage Flow for Prediction of Successful Catheter Ablation for Persistent Atrial Fibrillation

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

Eligibility Criteria:
Inclusion Criteria:~* First-time radiofrequency catheter ablation for pAF. pAF was defined as continuous AF lasting longer than 1 month, resistant to either electrical or pharmacological cardioversion.~* Informed consent~Exclusion Criteria:~* Severe valvular disease requiring surgery~* Valvular prosthesis~* Known severe coronary artery disease~* Atrial and/or ventricular thrombosis~* New York Heart Association functional class III to IV~* Cerebrovascular disease~* Pulmonary embolism~* Latent or manifest hyperthyroidism

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: None

Study Arms:
- patients with persistent atrial fibrillation ablation (Type: None): None

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