Patent
Thermal treatment methods and apparatus with focused energy application
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TLDR
In this paper, a collapsible ultrasonic reflector incorporating a gasfilled reflector balloon (50), a liquid-filled structural balloon (28) and an ultrasonic transducer (20) is disposed within the structural balloon.Abstract:
A collapsible ultrasonic reflector incorporates a gasfilled reflector balloon (50), a liquid-filled structural balloon (28) and an ultrasonic transducer (20) disposed within the structural balloon. Acoustic energy emitted by the transducer is reflected by a highly reflective interface between the balloons. In a cardiac ablation procedure, the ultrasonic energy is focused into an annular focal regions (44) to ablate cardiac tissue extending in an annular path along the wall. Devices for stabilizing the balloon structure and for facilitating collapse and withdrawal of the balloon structure are also disclosed.read more
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TL;DR: In this article, thermally-induced renal neuromodulation is achieved via delivery of a pulsed thermal therapy, in which parameters of the neural fibers, of non-target tissue, or of the thermal energy delivery element, may be monitored via one or more sensors for controlling the thermallyinduced neuromodi modality.
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References
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Journal ArticleDOI
Spontaneous Initiation of Atrial Fibrillation by Ectopic Beats Originating in the Pulmonary Veins
Michel Haïssaguerre,Pierre Jaïs,D. C. Shah,Atsushi Takahashi,Mélèze Hocini,G Quiniou,S. Garrigue,A Le Mouroux,P Le Métayer,Jacques Clementy +9 more
TL;DR: The pulmonary veins are an important source of ectopic beats, initiating frequent paroxysms of atrial fibrillation and these foci respond to treatment with radio-frequency ablation.
Journal ArticleDOI
Initiation of Atrial Fibrillation by Ectopic Beats Originating From the Pulmonary Veins Electrophysiological Characteristics, Pharmacological Responses, and Effects of Radiofrequency Ablation
Shih Ann Chen,Ming Hsiung Hsieh,Ching Tai Tai,Chin Feng Tsai,V. S. Prakash,Wen Chung Yu,Tsui Lieh Hsu,Yu An Ding,Mau Song Chang +8 more
TL;DR: Electrophysiological characteristics of PVs are different from those in the atria, and careful mapping and elimination of these ectopic foci can cure paroxysmal AF.
PatentDOI
Catheters for imaging, sensing electrical potentials and ablating tissue
TL;DR: In this paper, an acoustic imaging system for use within a heart has a catheter, an ultrasound device, and an electrode mounted on the catheter to create an ultrasonic image, and the electrode is arranged for electrical contact with the internal structure.
Journal ArticleDOI
A Focal Source of Atrial Fibrillation Treated by Discrete Radiofrequency Ablation
Pierre Jaïs,Michel Haïssaguerre,D. C. Shah,Salah Chouairi,L Gencel,Mélèze Hocini,Jacques Clementy +6 more
TL;DR: In some patients, the surface ECG pattern of atrial fibrillation is due to a focal rapidly firing source of activity that can be eliminated by discrete radiofrequency energy applications.
Patent
Systems and methods for conducting electrophysiological testing using high-voltage energy pulses to stun tissue
TL;DR: In this article, radio frequency energy is used to both temporarily stun tissue and to ablate tissue through a common electrode, which can be accomplished by tissue ablation or by the administration of medication.