نتایج جستجو برای: radiofrequency field
تعداد نتایج: 803430 فیلتر نتایج به سال:
BACKGROUND The long-term efficacy of radiofrequency ablation of renal autonomic nerves has been proven in nonrandomized studies. However, long-term safety of the renal artery (RA) is of concern. The aim of our study was to determine if cooling during radiofrequency ablation preserved the RA while allowing equivalent nerve damage. METHODS AND RESULTS A total of 9 swine (18 RAs) were included, ...
STUDY DESIGN Retrospective chart review. OBJECTIVES To determine the success rate and duration of relief of repeat radiofrequency neurotomy for lumbar facet joint pain. SUMMARY OF BACKGROUND DATA Radiofrequency neurotomy is an effective but temporary management of lumbar facet pain. When pain recurs, radiofrequency neurotomy is usually repeated, but the outcome and duration of relief for re...
Atrioventricular (AV) junction ablation for treatment of refractory atrial fibrillation is a well defined, standardized procedure and the simplest of commonly performed radiofrequency ablations in the field of cardiac electrophysiology. We report successful AV junction ablation using an inferior approach in a case of inferior vena cava interruption. Inability during the procedure to initially p...
The specific absorption rate is used as one of the main safety parameters in magnetic resonance imaging. The performance of imaging sequences is frequently hampered by the limitations imposed on the specific absorption rate that increase in severity at higher field strengths. The most well-known approach to reducing the specific absorption rate is presumably the variable rate selective excitati...
BACKGROUND Mapping to identify scar-related ventricular tachycardia re-entry circuits during sinus rhythm focuses on sites with abnormal electrograms or pace-mapping findings of QRS morphology and long stimulus to QRS intervals. We hypothesized that (1) these methods do not necessarily identify the same sites and (2) some electrograms are far-field potentials that can be recognized by pacing. ...
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