Please assess the completion status of the following clinical trial:

Trial Title: β-blockers Withdrawal in Patients With HFpEF and Chronotropic Incompetence: Effect on Functional Capacity (Preserve-HR)

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

Eligibility Criteria:
Inclusion Criteria:~* Stable symptomatic patients with heart failure and preserved ejection fraction (NYHA class II-III).~* NT-proBNP \>125 pg/mL in the last month~* Previous treatment with beta-blockers during the last 3 months~* Documented chronotropic incompetence, defined as: \[(heart rate at peak exercise- heart rate at baseline)\] / \[(220 - age) - (heart rate at baseline)\] \< 0.62~Exclusion Criteria:~* Moderate to severe valvulopathy or miocardiopathy associated~* Patient with heart failure with recovered ejection fraction~* Acute Coronary Syndrome in the previous 12 months~* Angina or signs of myocardial ischemia on cardiopulmonary exercise testing~* Baseline heart rate\>75 bpm.~* Uncontrolled hypertension, defined as \>140mmHg systolic blood pressure and/or \>90 mmHg diastolic blood pressure.~* Moderate to severe pulmonary disease associated~* Extracardiac comorbidity with a life expentancy less than 1 year.~* Unable to perform an adequate cardiopulmonary exersice test~* Previous treatment with digitalis or calcium channel blockers

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

Study Arms:
- Arm A (Type: ACTIVE_COMPARATOR): Controlled Withdrawal of Beta-blockers and Cardiopulmonary Exercise Testing (CPET) Patient will be assessed for chronotr0pic incompetence by CPET. If the patient exhibits chronotropic incompetence, we will reduce half dose of previous beta-blocker.~A cardiologist will evaluate clinically the the patient and the heart rate in 3 days. If clinical and heart rate stability (below 90 bpm), the patients will withdraw the beta-blocker and will be assessed by CPET at 15-day.~After second CPET, the patient will introduce the half-dose of beta-blocker and will be evaluated in 3 days. If clinical stability, the patient will introduce the previous dose of beta-blocker A third CPET will be performed at 15-day
- Arm B (Type: ACTIVE_COMPARATOR): Cardiopulmonary Exercise Testing (CPET) and Controlled Withdrawal of Beta-blockers Patient will be assessed for chronotropic incompetence by CPET.If the patient exhibits chronotropic incompetence, a cardiologist will evaluate clinically the patient and the heart rate in 3 days and will be assessed by CPET at 15-day.~After second CPET, the patient will reduce half dose of previous beta-blocker. A cardiologist will evaluate clinically the the patient and the heart rate in 3 days. If clinical and heart rate stability (below 90 bpm), the patients will withdraw the beta-blocker and will be assessed by CPET at 15-day.

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