Ablation Techniques

According to recent literature, liver disease causes approximately 2 million deaths annually; 1 million are attributed to the complications of cirrhosis, while the remaining deaths are caused by hepatocellular carcinoma (HCC). The latter currently ranks 16th among the leading causes of death worldwide. Current research focuses on investigating novel therapeutic modalities, optimizing surgical and anesthetic practices, and identifying biological biomarkers to predict disease progression and severity. In this study, we address radiofrequency ablation (RFA) with the goal of improving periprocedural prognosis, recurrence rates, and overall survival. Specifically, we will quantify the expression of NETosis, a relatively novel biomarker with potential therapeutic and prognostic value in HCC progression. NETosis is a regulated form of cell death through which granulocytes release decondensed chromatin and various proteases into the extracellular space, forming a web-like meshwork known as neutrophil extracellular traps (NETs). These structures are actively involved in hepatic tumorigenesis by promoting tumor growth and metastasis. Recent clinical data reveal that NETs play a key role in: Local tumor progression The incidence of hepatic metastasis Direct modulation of the immune response Hepatic ischemia-reperfusion injury Several recent studies demonstrate that the in vivo blockade of NETosis reduces tumor recurrence, mitigates the pro-inflammatory state, and serves as a valuable prognostic indicator in advanced liver disease \[2,3,4\]. To suppress NETosis expression and ultimately lower recurrence rates, our protocol evaluates the intraprocedural administration of 1% lidocaine followed by a continuous postoperative intravenous lidocaine infusion.

This is a single-center, investigator-initiated, prospective observational registry that will collect longitudinal clinical data on adult patients (≥18 years) undergoing endoscopic ultrasound (EUS)-guided radiofrequency ablation (RFA) or microwave ablation (MWA) for pancreatic and other gastrointestinal/hepatobiliary lesions as part of routine clinical care. The registry will not alter standard-of-care management. Data will be abstracted from the medical record and routine clinical systems. Primary outcomes include change in target lesion size on clinically obtained imaging and overall survival following ablation. Secondary outcomes include changes in tumor biomarkers, adverse events, non-target lesion changes, and patient-reported symptoms.

This is a prospective, randomized clinical trial evaluating the efficacy and safety of two techniques for repeat catheter ablation in patients with recurrent atrial fibrillation (AF): thermal energy ablation (radiofrequency) and non-thermal electroporation (pulsed field ablation), both guided by 3D imaging systems. Patients undergoing repeat AF ablation will be randomly assigned to receive either thermal or electroporation ablation, performed according to standard hospital protocols. No additional invasive procedures are required. Following the ablation, participants will attend follow-up visits at 3, 6, and 12 months, including medical history review, physical examination, 12-lead ECG, and 24-hour Holter monitoring. Unscheduled ECG assessments will also be available if arrhythmia symptoms occur. All study-related procedures are non-invasive and align with routine post-ablation care. Risks are limited to those typically associated with standard AF ablation procedures. The main benefit of participation is close, structured follow-up by experienced electrophysiologists, allowing for early detection of arrhythmia recurrence and timely medical intervention when necessary. Participant confidentiality and data protection will be ensured in accordance with GDPR regulations.

The aim of the described project is to establish a multicenter, nationwide registry of atrial arrhythmia ablation procedures using the Pulsed Field Ablation (PFA) method. These procedures have only recently begun to be performed in several centers across Poland. With proper coordination of the registry, this will enable the consolidation of clinical data and the expansion of knowledge regarding the efficacy and safety of these procedures.

The purpose of this study is to assess the effect of gastric fundal mucosal ablation (GFMA) on weight trajectory following discontinuation of once-weekly semaglutide or tirzepatide in adults with obesity. In this study, GFMA will be performed on patients who have experienced \> 10% weight loss with GLP-1 therapy and who plan to discontinue use of GLP-1 medications for the duration of the study.

This prospective national multicenter observational and interventional study aims to assess the longitudinal disease trajectory of patients with oligometastatic disease (OMD) who receive local metastasis-directed therapy. Patients with any category of OMD from any non-hematological cancer are eligible for inclusion. Local ablative therapy (LAT) includes surgical metastasectomy, radiotherapy, thermal ablation, and electroporations. The primary objective is to assess the time to failure of LAT strategy in patients with OMD from any primary cancer treated with all LAT modalities.