Temperature-controlled radiofrequency catheter ablation of manifest accessory pathways

Abstract

Temperature-controlled radiofrequency ablation of manifest accessory pathways is highly effective and safe. The temperature response is faster and significantly higher in left-sided energy applications compared to right-sided pulses. Peak temperature levels measured at the electrode tip are significantly higher during effective than ineffective pulses. Sudden rises in impedance are not completely prevented during temperature-controlled radiofrequency ablation of accessory pathway, although no procedure-related complications were noted in this patient cohort.

Prostate thermal therapy with high intensity transurethral ultrasound: The impact of pelvic bone heating on treatment delivery

“…Energy accumulated within the cortical bone can contribute to damaging adjacent soft tissue due to thermal redistribution (thermal conduction and blood flow mechanisms). Unwanted temperature elevations near pelvic bone are of particular concern for adjacent nerves, which have a high thermal sensitivity with low thermal dose thresholds for permanent or transient damage [48,[80][81][82].…”

MR Imaging and Cardiac Pacemakers: In Vitro Evaluation and in Vivo Studies in 51 Patients at 0.5 T

“…This increase in temperature occurs in a range that is used for temperature-controlled RF catheter ablation of cardiac accessory pathways and is probably capable of inducing tissue injury at the lead tips (36,37). In cases in which distant regions were imaged (ie, when the center of the region to be imaged was located 30 cm or farther from the center of the lead loop in the craniocaudal direction), the increase in temperature at the lead tip decreased distinctly, with a maximum value of 4.45°C at an SAR of 1.3 W/kg (Table 1).…”

Lesion Dimensions During Temperature-Controlled Radiofrequency Catheter Ablation of Left Ventricular Porcine Myocardium

“…Two studies concerning temperature-controlled radiofrequency ablation of accessory pathways in humans 21,22 found that applications on the atrial side of the tricuspid annulus (high-flow site) had significantly higher power consumption and lower reached average tip temperature than applications under the mitral valve (low-flow site, because the electrode tip is sheltered by the mitral leaflet). This is consistent with our finding that applications in the apex (low-flow area) had higher reached temperature and lower power consumption.…”