Please assess the completion status of the following clinical trial:

Trial Title: A Study to Investigate the Efficacy of PADN to Improved Functional Capacity and Hemodynamics in Patients With PAH

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

Eligibility Criteria:
Inclusion Criteria:~* Provision of informed consent prior to any study specific procedures;~* Men and women 18 years and older;~* Group I PAH, defined as a mPAP≥25mmHg, PCWP\<15mmHg and PVR\[The PVR =(mPAP-PCWP)/CO\]\>3.0 Woods unit.~Exclusion Criteria:~General exclusion criteria:~* Pregnancy and breast feeding mother;~* Estimated life expectancy \<12 months;~* Scheduled major surgery in the next 6 months;~* Inability to follow the protocol and comply with follow-up requirements or any other reason that the investigator feels would place the patient at increased risk;~* Previous enrolment in this study or treatment with an investigational drug or device under another study protocol in the past 30 days.~Procedural exclusion criteria:~* WHO group II, III, IV, V PH~* Severe Renal dysfunction (Ccr\<30 ml/min)~* Blood platelet count\<100,000/L~* Expected life span\<6-month~* Systematical inflammation~* Malignant cancer(s)~* Tricuspid valve stenosis, Supra-pulmonary valve stenosis~* Allergic to studied drugs or metal materials.

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

Study Arms:
- PADN + sildenafil (Type: EXPERIMENTAL): Two to three ablations at 1-15 W for 120 seconds at each point were performed in the distal bifurcation area of the main PA.
- sham PADN + sildenafil (Type: SHAM_COMPARATOR): The radiofrequency ablation catheter placed, no ablations.

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