Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
New method for predicting efficiency of heating by measuring bioimpedance during radiofrequency catheter ablation in humans
Autore:
Ko, WC; Huang, SKS; Lin, JL; Shau, WY; Lai, LP; Chen, PH;
Indirizzi:
Natl Taiwan Univ, Coll Med, Div Cardiol, Taipei 10018, Taiwan Natl Taiwan Univ Taipei Taiwan 10018 , Div Cardiol, Taipei 10018, Taiwan Cathay Gen Hosp, Div Cardiol, Taipei, Taiwan Cathay Gen Hosp Taipei Taiwan hay Gen Hosp, Div Cardiol, Taipei, Taiwan Natl Taiwan Univ, Coll Publ Hlth, Grad Inst Epidemiol, Taipei 10764, Taiwan Natl Taiwan Univ Taipei Taiwan 10764 nst Epidemiol, Taipei 10764, Taiwan
Titolo Testata:
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
fascicolo: 7, volume: 12, anno: 2001,
pagine: 819 - 823
SICI:
1045-3873(200107)12:7<819:NMFPEO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
TISSUE TEMPERATURE; TIP; MYOCARDIUM;
Keywords:
bioimpedance; catheter ablation; efficiency of heating;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Huang, SKS Natl Taiwan Univ, Coll Med, Div Cardiol, 1 Sect 1,Jen Ai Rd, Taipei 10018,Taiwan Natl Taiwan Univ 1 Sect 1,Jen Ai Rd Taipei Taiwan 10018 Taiwan
Citazione:
W.C. Ko et al., "New method for predicting efficiency of heating by measuring bioimpedance during radiofrequency catheter ablation in humans", J CARD ELEC, 12(7), 2001, pp. 819-823

Abstract

Introduction: Efficiency of heating (defined as the average temperature divided by the average power) during radiofrequency (RF) catheter ablation (RFCA) can be predicted by the electrode-tissue contact pressure before RFCA,To predict the efficiency of heating during RFCA, we prospectively measured bioimpedance and correlated the bioimpedance with the efficiency of heating in patients undergoing RFCA for supraventricular tachycardias,Method and Results: Of 239 RF applications in 55 patients, bioimpedance was measured from the distal pair of the electrodes of the ablation catheter using an extremely low current (10 muA at 45 kHz), Tip electrode temperature was measured with a closed-loop RF generator. Efficiency of heating and the difference (Delta bioimpedance) between preablation bioimpedance (measured from the target ablation site) and baseline bioimpedance (measured in the right atrium without tissue contact) were calculated. There was significant positive correlation between preablation bioimpedance and efficiency of heating (regression coefficient = 0.053; P = 0.003) and between Delta bioimpedance and efficiency of heating (regression coefficient = 0.067; P = 0.003), The highest degree of correlation was found during RFCA of the accessory pathways in the left free wall (regression coefficient = 0.14; P < 0.01),With preablation Delta bioimpedance > 21.5 Ohm, applications targeted at the left free-wall, left posteroseptal, or right septal accessory pathways had a greater likelihood of achieving effective tissue heating (defined as maximal temperature achieved > 55 degreesC),Conclusion: Both preablation bioimpedance and Delta bioimpedance have positive correlation with efficiency of heating during RFCA of supraventriculartachycardia, Measuring preablation bioimpedance appears to be a useful tool for predicting the efficiency of heating during RFCA.

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Documento generato il 28/01/20 alle ore 20:55:52