What this phase means
This study does not use the classic phase 1–4 drug ladder. It may be a device, a behavior program, a surgery timing study, or an early feasibility test.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Infusion of levosimendan, or Placebo infusion "Soluvit". The registry lists allocation as randomized. A single-center pilot prospective randomly assigned compared with a dummy treatment neither you nor the study doctors know who gets the real treatment clinical trial.
They plan to enroll about 50 people at Novosibirsk. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
The Effect of Levosimendan on Pulmonary Artery Pressure and Right Ventricular Function in the Perioperative Period in Patients With CTEPH After Pulmonary Thromboendarterectomy: a Single-center Pilot Prospective Randomized Placebo-controlled Double-blind Clinical Trial
Interventions: Infusion of levosimendan, Placebo infusion "Soluvit"
Primary outcome (registry wording): Mean pulmonary artery pressure (mPAP)