Please assess the completion status of the following clinical trial:

Trial Title: Release of Acetylcholine From the Ganglionated Plexus During the Thaw Phase of Cryoballon Pulmonary Vein Ablation (GP RESPONSE Study)

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

Eligibility Criteria:
Inclusion Criteria:~* patients with atrial fibrillation undergoing first time cryoballoon ablation~* age 18-80~Exclusion Criteria:~* any prior left atrial ablation or cardiac surgery~* hemoglobin level of \<12.0 g/dL~* refusal or inability to provide informed consent

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

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