Patent
Apparatus and method for intra-cardiac ablation of arrhythmias
Frank I. Marcus,Kullervo Hynynen +1 more
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TLDR
In this article, an ultrasonic transducer was used to destroy the myocardial tissue implicated in arrhythmic arrhythmias using ultrasonic energy delivered to myocardia.Abstract:
The present invention employs ultrasonic energy delivered to myocardial tissue at frequencies sufficient to destroy the myocardial tissue implicated in the arrhythmic. More specifically, the present invention comprises an ultrasonic transducer mounted on a distal end of a catheter and at least one electrode associated with the distal end region of the catheter. The ultrasonic transducer may be a single crystal transducer or a phased array crystal transducer.read more
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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.
Patent
Method and apparatus for thoracoscopic intracardiac procedures
TL;DR: A tubular access device having an inner lumen is provided for positioning through a penetration in a muscular wall of the heart, the access device has a means for sealing within the penetration to inhibit leakage of blood through the penetration as discussed by the authors.
Patent
Fluid-assisted medical devices, systems and methods
TL;DR: In this article, the authors describe an exemplary surgical device for treating tissue and methods of treating tissue, which includes a handle, a fluid passage connectable to a fluid source, a tip portion and a distal end.
Patent
Medical diagnosis, treatment and imaging systems
TL;DR: In this article, a locating system for determining the location and orientation of an invasive medical instrument relative to a reference frame is proposed, consisting of a plurality of field generators (18, 20, 22) which generate known, distinguishable fields, preferably continuous AC magnetic fields, in response to drive signals, and a set of sensors (30, 32, 34, 34) which proximate the distal end of the invasive medical device and generate sensor signals in response.
Patent
Circumferential ablation device assembly
TL;DR: In this article, a circumferential ablation device assembly is presented which is adapted to forming a conduction block in a pulmonary vein, which circumscribes the pulmonary vein lumen and transects the electrical conductivity of the vein against conduction along its longitudinal axis.
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Patent
Catheter for mapping and ablation and method therefor
TL;DR: A multipolar electrode catheter as discussed by the authors includes a central and four side electrodes at its distal end, where the side electrodes lie in the same plane and equally spaced from adjacent electrodes.
Patent
Method and apparatus for high frequency catheter ablation
TL;DR: In this paper, a catheter with a flexible coaxial transmission line (coax) terminated by an antenna is introduced into a chamber of the heart for treatment of tachycardia or cardiac disrhythmia.
Patent
Laser catheter with imaging capability
Paul G. Yock,James W. Arenson +1 more
TL;DR: In this article, a fixed ultrasonic transducer which directs ultrasonic energy at a reflective surface on a rotating element is used to scan the interior of the blood vessel prior to the application of laser energy to ablate the obstruction.
Patent
Angioplastic method for removing plaque from a vas
TL;DR: In this paper, fat artherosclerotic plaque is liquified and sucked into the interior of one of two catheters of a catheter arrangement through an aperture therein and then sucked out of a patient's body through the proximal end of the one catheter.
Patent
Electronically-controlled variable focus ultrasound hyperthermia system
TL;DR: In this paper, the phase delays in the excitation of individual transducer elements are varied, without changing the distance between the transducers and the patient, and the focal depth of the ultrasonic beam can be varied.