OBJECTIVE To compare the outcome of cryothermal and radiofrequency energy transcatheter ablation of atrioventricular junctional re-entrant tachycardia in children and adolescents. DESIGN Case series with internal comparison. SETTING Two hospitals in Hong Kong. PATIENTS Consecutive transcatheter ablation procedures for atrioventricular junctional re-entrant tachycardia in children and adol...

OBJECTIVE To evaluate the safety and effectiveness of different bipolar radiofrequency system algorithms in interrupting the renal sympathetic nerves and reducing renal norepinephrine in a healthy porcine model. METHODS A porcine model (N = 46) was used to investigate renal norepinephrine levels and changes to renal artery tissues and nerves following percutaneous renal denervation with radio...

BACKGROUND In selected patients with hypertension, renal artery (RA) stenting is used to treat significant atherosclerotic stenoses. However, blood pressure often remains uncontrolled after the procedure. Although catheter-based renal denervation (RDN) can reduce blood pressure in certain patients with resistant hypertension, there are no data on the feasibility and safety of RDN in stented RA....

BACKGROUND Radiofrequency ablation inside pulmonary vein (PV) ostia can cause PV stenosis. A novel alternative method of ablation is irreversible electroporation, but the long-term response of PVs to electroporation ablation is unknown. METHODS AND RESULTS In ten 6-month-old pigs (60-75 kg), the response of PVs to circular electroporation and radiofrequency ablation was compared. Ten consecut...

BACKGROUND To evaluate the potential effects of irreversible electroporation ablation on the Achilles tendon in a rabbit model and to compare the histopathological and biomechanical changes between specimens following electroporation ablation and radiofrequency ablation. METHODS A total of 140 six-month-old male New Zealand rabbits were used. The animals were randomly divided into two groups,...

Radiofrequency cautery is widely used in minor surgery. However, it has not been considered to fit for major surgery. Herein, we report two cases of pneumothorax surgery using lowthermal coagulation by this general-purpose radiofrequency cautery device. Case 1: A 47-year-old male underwent bullectomy with a general radiofrequency cautery. We used Elleman® Surgitron PellevéTM S5 (Elleman Interna...

Fractional Erbium:Glass 1550nm laser is a fractional photothemolysis (FP) laser with high effectiveness in atrophic acne scars treatment. Recently, fractional bipolar radiofrequency (RF) has been introduced to improve the efficacy and reduce side effects of the FP. Objective: The objective of the study was to compare the effectiveness and side effects of fractional bipolar radiofrequency with f...

BACKGROUND The relationship between focal pulmonary vein potential and atrial fibrillation (AF) has been confirmed. Pulmonary vein (PV) isolation and circumferential pulmonary vein ablation have been the most commonly used procedures of radiofrequency ablation. However, few studies have investigated the relationship between anatomical characteristics of PV and AF recurrences after radiofrequenc...

BACKGROUND Degenerative spondylolisthesis is one of the major causes for low back pain. Morphological abnormalities of the zygapophysial joints are a predisposing factor in the development of degenerative spondylolisthesis. Therefore, radiofrequency neurotomy seems to be a rational therapy. OBJECTIVES To determine if radiofrequency neurotomy is effective for patients with low back pain and de...

in this paper, we proposed a novel structure for designing all optical filter based on photonic crystal structure. in designing the proposed filter, we simply employed a point defect localized between input and output waveguides as wavelength selecting part of the filter. the initial form of this filter is capable of selecting optical waves at =1560 nm, the transmission efficiency of the filte...