Electrode radius predicts lesion radius during radiofrequency energy heating. Validation of a proposed thermodynamic model.

Proposed Thermodynamic Model

Myocardial heating by transcatheter delivery of radiofrequency (RF) energy has been proposed as an effective means of arrhythmia ablation. A thermodynamic model describing the radial temperature gradient at steady state during RF-induced heating is proposed. If one assumes that RF power output is adjusted to maintain a constant electrode-tissue interface temperature at all times, then this ther...

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

Radiofrequency energy-induced heating during MR procedures: a review.

During an MR procedure, most of the transmitted RF power is transformed into heat within the patient's tissue as a result of resistive losses. Not surprisingly, the primary bioeffects associated with the RF radiation used for MR procedures are directly related to the thermogenic qualities of this electromagnetic field. This review article discusses the characteristics of RF energy-induced heati...

Radius Mass Position of Radius

Radiofrequency Energy-induced Heating of Bovine Articular Cartilage Using a Temperature-controlled, Bipolar Rf Electrode

Chondrocytes are known to be thermal-sensitive, insofar as excessive temperatures may cause cellular death and promote the degeneration of articular cartilage (3). Therefore, it is imperative to determine and use the lowest possible settings of RF energy that will produce the desired effects (1-3). Similar to other studies conducted to characterize temperature changes for tissues treated using ...