Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Microwave ablation of myocardial tissue: The effect of element design, tissue coupling, blood flow, power, and duration of exposure on lesion size
Autore:
Thomas, SP; Clout, R; Deery, C; Mohan, AS; Ross, DL;
Indirizzi:
Westmead Hosp, Dept Cardiol, Westmead, NSW 2145, Australia Westmead Hosp Westmead NSW Australia 2145 , Westmead, NSW 2145, Australia Univ Technol, Fac Engn, Telecom Grp, Sydney, NSW, Australia Univ Technol Sydney NSW Australia n, Telecom Grp, Sydney, NSW, Australia
Titolo Testata:
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
fascicolo: 1, volume: 10, anno: 1999,
pagine: 72 - 78
SICI:
1045-3873(199901)10:1<72:MAOMTT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATHETER ABLATION; IN-VITRO; VENTRICULAR-TACHYCARDIA; HYPERTHERMIA; THERAPY; ANTENNA; ENERGY; VOLUME; VIVO;
Keywords:
ablation; myocardium; microwave; arrhythmia; dielectric;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Ross, DL Westmead Hosp, Dept Cardiol, Westmead, NSW 2145, Australia Westmead Hosp Westmead NSW Australia 2145 d, NSW 2145, Australia
Citazione:
S.P. Thomas et al., "Microwave ablation of myocardial tissue: The effect of element design, tissue coupling, blood flow, power, and duration of exposure on lesion size", J CARD ELEC, 10(1), 1999, pp. 72-78

Abstract

Introduction: The biophysical properties of microwave electromagnetic radiation suggest that it may be an alternative to radiofrequency (RF) energy for ablation of arrhythmias resistant to treatment using RF ablation. Methods and Results: The aim of this study was to characterize lesions produced using simple element designs in a blood superfused ovine tissue modelto simulate endocardial ablation, The effect of tissue bath how, duration of microwave exposure, and changes in forward power on lesion size were examined using a modified monopole element, Lesion size increased with increasing duration of exposure and increasing forward power (P < 0.05). Lesion depth was 0.7 +/- 0.7 mm after 30 seconds and 11.5 +/- 1.9 mm after 360 seconds. Lesion depths at 61, 71, and 80 W were 6.4 +/- 3.7, 8.9 +/- 2.0, and 11.9 +/- 1.2 mm, respectively. Altering how within the hath from 3 to 5 L/mindid not significantly change lesion size. Conclusion: Simple element designs can be used to produce a range of lesions from very small sizes to lesions that are transmural in the ventricle, The temperature half-time for microwave ablation is far greater than that ofRF ablation. Like RF lesions, the lesions produced by microwave ablation have greater width than depth. Deep penetration of lesions into the ventricular myocardium can only be achieved with these elements by producing lesions of perhaps unnecessarily large volume.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 02:48:15