Experimental Study of Catheter Ablation Using Ultrasound Energy in Canine and Porcine Hearts

We examined the efficacy and safety of ultrasound energy in eliminating the arrhythmogenic substrates of atrial as well as ventricular tissue using a newly developed instrument in both in vivo and in vitro experiments. Ultrasound (US) applicators were tested on 79 lesions created on a beating heart...

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Veröffentlicht in:	Japanese Heart Journal 1998, Vol.39(3), pp.399-409
Hauptverfasser:	OHKUBO, Toyoyuki, OKISHIGE, Kaoru, GOSEKI, Yoshinari, MATSUBARA, Tetsu, HIEJIMA, Kazumasa, IBUKIYAMA, Chiharu
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Biological and medical sciences Cardiac dysrhythmias Cardiac Surgical Procedures - adverse effects Cardiac Surgical Procedures - instrumentation Cardiac Surgical Procedures - methods Cardiology. Vascular system Catheter ablation Catheter Ablation - adverse effects Catheter Ablation - instrumentation Catheter Ablation - methods Dogs Electrocardiography Evaluation Studies as Topic Feasibility Studies Female Heart In Vitro Techniques Male Medical sciences Monitoring, Intraoperative Swine Tachycardia Ultrasonic Therapy - adverse effects Ultrasonic Therapy - instrumentation Ultrasonic Therapy - methods Ultrasound energy
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Zusammenfassung:	We examined the efficacy and safety of ultrasound energy in eliminating the arrhythmogenic substrates of atrial as well as ventricular tissue using a newly developed instrument in both in vivo and in vitro experiments. Ultrasound (US) applicators were tested on 79 lesions created on a beating heart in canine cardiac tissue, and on 64 lesions in porcine heart specimens. US lesions were created by using transducers with frequencies around 5-10MHz. In the in vivo study, we observed a significant decrease in the amplitude of the electrograms recorded from the tip of the ablation catheter during the US application (p
ISSN:	0021-4868 1348-673X
DOI:	10.1536/ihj.39.399