Wullah

10.01.2018 2 Comments

Recent work has attempted to define what these optimal targets should be, and approaches to do this include assessing for sites of pulmonary vein reconnection after ablation, or comparing the impedance response to ablation. CFE and DF measurements are not significantly affected by changes in CF or catheter orientation but higher CF is associated with increased atrial ectopics in sinus rhythm. It is likely that use of CF-sensing technology will allow for the optimization of each individual radiofrequency application to maximize efficacy and procedural safety. However, for each of these parameters there are also studies suggesting a lack of difference from the availability of CF data. On the other hand, changing CF at the same location correlated with changing electrogram size Pearson's Correlation 0. Close affiliations Journal of Atrial Fibrillation [29 Feb , 8 5: Published on behalf of the European Society of Cardiology. On sub-analysis by location, the correlation at the infero-posterior LA was strongest Point-Biserial correlation 0. Mechanical stretch is known to affect atrial electrical properties.

Wullah


CFE and DF measurements are not significantly affected by changes in CF or catheter orientation but higher CF is associated with increased atrial ectopics in sinus rhythm. Multicenter prospective randomized data are lacking in this field and required to define the CF parameters required to produce optimal ablation. These results suggest that electrograms observed in mapping studies are only minimally affected by changes in contact force and confirm the sensitivity of the left atrium to mechanical stretch. On the other hand, changing CF at the same location correlated with changing electrogram size Pearson's Correlation 0. Catheter contact varies within the left atrium secondary to factors including respiration, location, atrial rhythm and the trans-septal catheter delivery technology used. Within the left atrium LA the mapping catheter delivers a stretch stimulus which may also affect the tissue's electrical properties. For permissions please email: Advanced Search Abstract Background: The electrogram data was analysed using custom-written automated scripts and the Carto3 automated complex fractionated electrogram CFE analysis tools. Across 22 patients 16 in atrial fibillation AF , 6 in sinus rhythm SR , undergoing first-time AF ablation, 1, stable LA mapping points comprising 8 second contact force CF and electrogram data were acquired. Published on behalf of the European Society of Cardiology. Based on such work, it is apparent that factors including mean CF, force time integral the area under the force-time curve and contact stability are important determinants of ablation efficacy. Recent work has attempted to define what these optimal targets should be, and approaches to do this include assessing for sites of pulmonary vein reconnection after ablation, or comparing the impedance response to ablation. Pre-clinical work has established that the degree of contact between the radiofrequency ablation catheter and myocardium correlates with the size of the delivered lesion. Close affiliations Journal of Atrial Fibrillation [29 Feb , 8 5: Compared with procedures performed without contact force CF -sensing, the use of this technology has, in some studies, been found to improve complication rates, procedure and fluoroscopy times, and success rates. It is likely that use of CF-sensing technology will allow for the optimization of each individual radiofrequency application to maximize efficacy and procedural safety. Points were taken in groups of 3 to 4 eight second recordings at the same location with CF or catheter orientation actively changed between acquisitions. Mechanical stretch is known to affect atrial electrical properties. However, for each of these parameters there are also studies suggesting a lack of difference from the availability of CF data. Nevertheless, CF-sensing technology has been adopted as a standard of care in many institutions. Excess contact is associated with steam pops and perforation. On sub-analysis by location, the correlation at the infero-posterior LA was strongest Point-Biserial correlation 0.

Wullah


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2 thoughts on “Wullah”

  1. Compared with procedures performed without contact force CF -sensing, the use of this technology has, in some studies, been found to improve complication rates, procedure and fluoroscopy times, and success rates.

  2. CFE and DF measurements are not significantly affected by changes in CF or catheter orientation but higher CF is associated with increased atrial ectopics in sinus rhythm.

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