Please assess the completion status of the following clinical trial:

Trial Title: Cardiovascular Complications of Sickle Cell Disease

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

Eligibility Criteria:
Inclusion Criteria:~* Patients must be 18+~* Patients who were diagnosed with SCD confirmed by high-pressure liquid chromatography or hemoglobin electrophoresis will be eligible for the study~* Only patients in stable condition will be included~* Patients receiving transfusions will not be excluded~Exclusion Criteria:~* Patients with vaso-occlusive crises or an episode of acute chest syndrome within the previous four weeks (after 4 weeks have passed, the patients may be re-evaluated for eligibility)~* Patients with high degree heart block; active, hemodynamically significant, ventricular arrhythmias; unstable coronary syndromes; history of myocardial infarction within 1 month of the study.~* Contraindications to gadolinium-enhanced magnetic resonance examination such as severe claustrophobia, Pacemaker, defibrillators, cerebral aneurysm clips, or neurostimulator.~* Pregnancy~* Patients with sinus node dysfunction

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

Study Arms:
- Subjects with Sickle Cell Disease (SCD) (Type: None): 38 clinically stable black patients with Sickle Cell Disease (SCD) (including individuals with hemoglobin SS, SC, and β-thalassemia demonstrated by high-performance liquid chromatographic separation or gel electrophoresis).
- Healthy Volunteers (Type: None): 13 healthy control subjects were frequency matched to patients with SCD on age, sex, and race.

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