James M Hassett

US Patent:

6466811, Oct 15, 2002

Filed:

May 12, 2000

Appl. No.:

09/570279

Inventors:

James A. Hassett - Bloomington MN

Assignee:

Daig Corporation - Minnetonka MN

International Classification:

A61B 504

US Classification:

600374, 600381, 607122

Abstract:

A device for the mapping of cardiac arrhythmia foci including a catheter body having a distal tip, first and second point electrodes, which are secured to the catheter body and which form a first bipolar pair of electrodes, and third and fourth point electrodes, which are secured to the catheter body and which form a second bipolar pair of electrodes, wherein a line passing between the third and fourth point electrodes is within about 45 degrees of being perpendicular to a line passing through the first and second point electrodes.

US Patent:

6526302, Feb 25, 2003

Filed:

Dec 4, 2000

Appl. No.:

09/728961

Inventors:

James A. Hassett - Bloomington MN

Assignee:

Daig Corporation - Minnetonka MN

International Classification:

A61B 5042

US Classification:

600374, 600585, 604281, 606 41, 607122

Abstract:

A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.

US Patent:

6540744, Apr 1, 2003

Filed:

Mar 22, 2001

Appl. No.:

09/814890

Inventors:

James A. Hassett - Bloomington MN
John F. Swartz - Afton OK
Michael C. Bednarek - Buffalo MN

Assignee:

St. Jude Medical, Daig Division, Inc. - Minnetonka MN

International Classification:

A61B 1818

US Classification:

606 45, 606 49, 607101, 607122

Abstract:

A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.

US Patent:

6540755, Apr 1, 2003

Filed:

Mar 19, 2001

Appl. No.:

09/811849

Inventors:

John D. Ockuly - Minnetonka MN
James A. Hassett - Bloomington MN

Assignee:

Daig Corporation - Minnetonka MN

International Classification:

A61F 1100

US Classification:

606108, 604528, 600585, 600434

Abstract:

A process for the mapping and/or ablation of accessory pathways around the mitral valve using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are shapes for the guiding introducers to be used for the ablation and/or mapping of the accessory pathways around the mitral valve using a retrograde approach.

US Patent:

6799064, Sep 28, 2004

Filed:

Aug 20, 2002

Appl. No.:

10/224067

Inventors:

James A. Hassett - Bloomington MN

Assignee:

St. Jude Medical, Daig division - Minnetonka MN

International Classification:

A61B 504

US Classification:

600374, 600381, 607122

Abstract:

A device for the mapping of cardiac arrhythmia foci including a catheter body having a distal end, first and second point electrodes, which are secured in the surface of the catheter body and which form a first bipolar pair of electrodes, and third and fourth point electrodes, which are secured in the surface of the catheter body and which form a second bipolar pair of electrodes, wherein a line passing between the third and fourth point electrodes is within about 45 degrees of being perpendicular to a line passing through the first and second point electrodes and wherein all four point electrodes are secured to that portion of the surface of the catheter body forming no more than half of the circumference of the surface of the catheter body when viewed from the distal tip of the catheter so that all four electrodes can be in contact with the cardiac tissue at the same time during a cardiac procedure.

US Patent:

7118568, Oct 10, 2006

Filed:

Mar 31, 2003

Appl. No.:

10/401798

Inventors:

James A. Hassett - Bloomington MN, US
John F. Swartz - Afton OK, US
Michael C. Bednarek - Buffalo MN, US

Assignee:

St. Jude Medical, Atrial Fibrillation Division, Inc. - Maple Grove MN

International Classification:

A61B 18/18

US Classification:

606 45, 606 49, 607101, 607122

Abstract:

A process for preventing atrial premature contractions originating within a pulmonary vein from being conducted into the left atrium of a human heart. More specifically, an ablation lesion is formed which electrically isolates the located source of the atrial premature contraction in the pulmonary vein from connection with the left atrium and blocks passage of the atrial premature contraction originating from the located source. In one embodiment, the steps of the process include advancing a medical device into the left atrium of a human heart, introducing the advanced medical device into the pulmonary vein from the left atrium of a human heart, sensing electrical activity within the pulmonary vein using the introduced medical device, locating a source of the atrial premature contraction within the pulmonary vein using the sensed electrical activity, and forming an ablation lesion in tissue of the pulmonary vein at a location proximal from the located source of the atrial premature contraction within the pulmonary vein. Conductive media and various medical devices may be used with the process.

US Patent:

7248913, Jul 24, 2007

Filed:

Jul 14, 2005

Appl. No.:

11/183112

Inventors:

James A. Hassett - Bloomington MN, US

Assignee:

St. Jude Medical, Atrial Fibrillation Division, Inc. - Maple Grove MN

International Classification:

A61B 5/042
A61M 25/00
A61N 1/05

US Classification:

600374, 600585, 604281, 606 41, 607122

Abstract:

A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.

US Patent:

7635353, Dec 22, 2009

Filed:

Sep 22, 2004

Appl. No.:

10/947817

Inventors:

Ravisankar Gurusamy - Eagan MN, US
John D. Ockuly - Waikoloa HI, US
Hans Schnellmann - Lausanne, CH
James A. Hassett - Eden Prairie MN, US

Assignee:

St. Jude Medical, Atrial Fibrillation Division, Inc. - St. Paul MN

International Classification:

A61M 5/178
A61M 5/32
A61B 17/34

US Classification:

60417003, 604272, 606185

Abstract:

The instant invention is directed toward transseptal puncture needles and transseptal puncture needle assemblies. More specifically, it relates to curved transseptal puncture needles and needle assemblies that facilitate insertion through curved transseptal introducers. Each curved transseptal puncture needle includes a needle tip with a tangential back bevel configuration, a reverse tangential back bevel configuration, or a conical reverse bevel configuration. The axial orientation of the needle tip relative to the needle curvature, whether on the concave side or convex side of the curved transseptal puncture needle, provides additional benefits. The leading edge of the needle tip is located at a distal end of an inner needle tube, and the leading edge of the needle tip may be positioned away from an outer surface of the inner needle tube and adjacent to an inner surface of the inner needle tube.