Please assess the completion status of the following clinical trial:

Trial Title: Comparison of Diltiazem and Metoprolol in the Management of Acute Atrial Fibrillation or Atrial Flutter

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~Eligible patients had to have a 12-lead electrocardiogram (ECG) showing atrial fibrillation or atrial flutter with a ventricular rate of greater than or equal to 120 beats per minute and a systolic blood pressure of greater than or equal to 90 mmHg.~Exclusion Criteria:~Patients were excluded if they had any of the following:~* a systolic blood pressure \<90 mmHg, ventricular rate greater than or equal to 220 beats per minute,~* QRS \>0.100 seconds, 2nd or 3rd degree atrioventricular (AV) block,~* temperature \>38.0 ˚C,~* acute ST elevation myocardial infarction,~* known history of New York Heart Association Class IV heart failure or~* active wheezing with a history of bronchial asthma or COPD.~In addition, patients were excluded if there was:~* prehospital administration of diltiazem or any other AV nodal blockading agent,~* a history of cocaine or methamphetamine use in the previous 24 hours prior to arrival,~* a history of allergic reaction to diltiazem or metoprolol,~* a history of sick sinus or pre-excitation syndromes,~* a history of anemia with hemoglobin \<11.0 g/dl,~* pregnancy or breastfeeding.

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

Study Arms:
- Metoprolol Study Group (Type: ACTIVE_COMPARATOR): Patients Receiving metoprolol administered at a dose of 0.15 mg/kg (to a maximum dose of 10 mg)
- Diltiazem Study Group (Type: ACTIVE_COMPARATOR): Patients receiving diltiazem administered parenterally at a dose of 0.25 mg/kg (to a maximum dose of 30 mg)

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