There are about 2352 clinical studies being (or have been) conducted in Bulgaria. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
The behaviour of the endometrium during its receptive phase is highly dependent on the endometrial cell type composition. Each cell type has its role in the endometrial preparation for the invading embryo. Alteration in the immune cells dialogue could be the main reason for unsuccessful implantation in certain patients. Immune cell homeostasis is often improved by intrauterine administration of autologous PBMC. There have been numerous reports on the positive effects of the intrauterine administration of autologous PBMC on the IVF outcomes (embryo implantation and ongoing pregnancy success). However, there is little data on the direct effect of the PBMC administration on the cell composition of the endometrium. This study will focus on the changes in the endometrial cell populations by PBMC treatment that could lead to IVF outcome improvement. The aim of this project is to analyze the effect of intrauterine administration of autologous PBMC on the endometrial cell populations and on the IVF outcome parameters (implantation and ongoing pregnancy success as IVF outcome variables).
The present study is a 5-year follow-up of the Allergy Reduction Trial (A.R.T.) birth cohort study of 551 infants at high-risk for allergy. The A.R.T. 5-year follow-up study, aims to investigate the prolonged effect of each feeding regimen [formula-fed (exclusively or partially) with the partially hydrolyzed formula (pHF) or the standard formula (SF), or exclusively breastfed] within the first 6 months of life on the development of any allergic manifestations up to the age of 5 years. Allergic manifestations within this time period will include the presence of any of the following: atopic dermatitis, food allergies, respiratory allergies, urticaria, drug allergy and insect venom allergy. In addition, differences on growth (weight, height, BMI) will be examined.
This is a randomized, blinded, placebo-controlled, dose-ranging Phase 1b study of the safety, PK, and antiviral activity of ABI-H3733 in treatment-naïve or off-treatment chronic Hepatitis B virus (cHBV) subjects that are Hepatitis B e antigen (HBeAg) positive or negative. The study will enroll up to 5 sequential cohorts of 10 subjects each, for a total of up to 50 subjects, randomized 8:2 to receive ABI-H3733 or placebo.
This is a two-part study evaluating the effectiveness of CRD-740 in patients with either Heart Failure with Reduced Ejection Fraction (HFrEF) or Heart Failure with Preserved Ejection Fraction (HFpEF) after 12 weeks of treatment. The primary objective in Part A is to assess the effect of CRD-740 compared to placebo in plasma cGMP at Week 4. The primary objective in Part B is to determine whether CRD-740 reduces NT-proBNP compared to placebo at Week 12.
A clinical trial to investigate the pharmacokinetics, safety and tolerability of CHF6001 after single administrations in participants with mild, moderate and severe liver impairment with matched healthy adult volunteers
This is a randomized, double-blind, parallel, multicenter, multinational study to compare the efficacy, pharmacokinetics, pharmacodynamics, safety and immunogenicity of MB09 versus Prolia® in postmenopausal women with osteoporosis
Background: A Danish study raised the question of the usefulness of escalating energy protocols compared to fixed high-energy protocols. Maximal energies are usually the final choice of the physicians. Some authors showed that decreasing impedance by manual pressure application (MPA) had a positive impact on cardioversion outcome. This is likely due to the impedance decrease linked to MPA. Objective: This new clinical cardioversion study of atrial fibrillation (AF) patients aims to compare the efficacy and safety of a new high energy escalation strategy. The protocol combines high energy shocks at first shock, jumping to maximal defibrillator energy at second shock and finally complemented by MPA at third shock, if success is not reached using electric shocks only. Experimental design: Patients will be recruited at the Intensive Cardiology Care Unit, Cardiology Clinic, National Cardiology Hospital (NCH), Sofia, Bulgaria. All eligible patients will sign a written informed consent prior to the cardioversion and will receive the standard hospital procedures during cardioversion. AF patients will be alternatively randomized to cardioversion using one of the two defibrillators, following the strategy below: DEFIGARD HD-7 arm: 3 consecutive shocks with escalating selected energy: 150J, 200J, 200J. The third shock is combined with MPA LIFEPAK15 arm: 3 consecutive shocks with escalating selected energy: 150J, 360J, 360J. The third shock is combined with MPA The statistical power analysis will consider a superiority comparison between the cumulative energy actually delivered by both defibrillators. The secondary cardioversion efficacy outcome measures are: the cumulative success rate (measured at 1 minute post-shock), number of delivered shocks. Delivered energy will be measured during each shock with a dedicated pulse recording device (approved by the NCH Ethical Committee). Heart rhythm will be measured in continuously recorded peripheral ECG. The secondary cardioversion safety outcome measures are: markers for myocardial necrosis (high sensitive troponin I, CK-MB) evaluated on blood samples taken before and 8-12 hours after cardioversion; ST-segment changes (post-shock - pre-shock) measured in lead II; Complications after cardioversion measured during 2 hours follow-up period in the ICCU - the presence of apnea, arrhythmias, bradycardia and the need for respective therapy at the discretion of attending physician.
The trial will be conducted as a prospective, randomized, multinational, multicenter, double-blind, placebo and active controlled trial in 4 parallel-groups of patients suffering from seasonal allergic rhinitis.
This is a randomized, placebo-controlled, crossover study of SPI-62 in subjects with ACTH-dependent Cushing's syndrome. Subjects will receive each of the following 2 treatments for 12 weeks: SPI-62 and matching placebo
A multicenter, randomized, double-blind, placebo-controlled, study to evaluate the efficacy and safety of oral ivermectin tablets versus placebo for COVID-19 prophylaxis