Please assess the completion status of the following clinical trial:

Trial Title: Activation Timing and 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:~* any patient followed at Essentia Health - St. Mary's Medical Center, Duluth, MN and who is referred for a diagnostic EP study with or without ablation.~Exclusion Criteria:~* any patient who will undergo an EP study without usual placement of a coronary sinus catheter;~* any patient with permanent (chronic) atrial fibrillation or tachycardia who will not undergo restoration of sinus rhythm during the course of the procedure as a usual part of the procedure;~* any patient who is not willing or unable to provide informed consent.

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

Study Arms:
- Atrial Fibrillation (Type: None): Patients with atrial fibrillation during the EP study
- Bundle Branch Block (Type: None): Patient with bundle branch block during the course of the EP study

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