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    21.
    发明专利
    未知

    公开(公告)号：DE60031321T2

    公开(公告)日：2007-05-10

    申请号：DE60031321

    申请日：2000-04-03

    Applicant: MEDTRONIC INC

    Inventor： STEWART MARK T ,  FLICKINGER WILLIAM J ,  FRANCISCHELLI DAVID E ,  MEHRA RAHUL ,  MIN XIAOYI

    IPC: A61B18/14 ,  A61B17/00

    Abstract: A catheter assembly for treatment of cardiac arrhythmia, for example, atrial fibrillation, by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The catheter assembly includes a catheter body 22 and at least one electrode 26. The catheter body includes a proximal portion 28, an intermediate portion 30 and a distal portion 32. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and forms a substantially closed loop 34, parallel or transverse to the longitudinal axis. The at least one electrode 26 is disposed along the loop. With this configuration, the loop is axially directed into contact with the chamber wall about the vessel ostium. Upon energization, the electrode ablates a continuous lesion pattern about the vessel ostium, thereby electrically isolating the vessel from the chamber.

    26.
    发明专利
    未知

    公开(公告)号：DE60222114T2

    公开(公告)日：2008-05-15

    申请号：DE60222114

    申请日：2002-04-25

    Applicant: MEDTRONIC INC

    Inventor： FRANCISCHELLI DAVID E ,  MEHRA RAHUL ,  SKARDA JAMES R ,  SCHWARTZMAN DAVID ,  WARMAN EDUARDO N ,  STEWART MARK T ,  PURYEAR HARRY A

    IPC: A61B18/14 ,  A61B5/04 ,  A61B18/12 ,  A61N1/40

    Abstract: A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the depolarization signal in a local electrogram taken using electrodes located adjacent the tissue to be ablated. Following onset of application of ablation energy to heart tissue, the local electrogram is measured with electrodes located adjacent tissue to be ablated so that the ablation energy to ablation elements can be selectively reduced or terminated when transmurality is detected.

    27.
    发明专利
    未知

    公开(公告)号：DE60222114D1

    公开(公告)日：2007-10-11

    申请号：DE60222114

    申请日：2002-04-25

    Applicant: MEDTRONIC INC

    Inventor： FRANCISCHELLI DAVID E ,  MEHRA RAHUL ,  SKARDA JAMES R ,  SCHWARTZMAN DAVID ,  WARMAN EDUARDO N ,  STEWART MARK T ,  PURYEAR HARRY A

    IPC: A61B18/14 ,  A61B5/04 ,  A61B18/12 ,  A61N1/40

    Abstract: A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the depolarization signal in a local electrogram taken using electrodes located adjacent the tissue to be ablated. Following onset of application of ablation energy to heart tissue, the local electrogram is measured with electrodes located adjacent tissue to be ablated so that the ablation energy to ablation elements can be selectively reduced or terminated when transmurality is detected.

    28.
    发明专利
    未知

    公开(公告)号：DE60031321D1

    公开(公告)日：2006-11-30

    申请号：DE60031321

    申请日：2000-04-03

    Applicant: MEDTRONIC INC

    Inventor： STEWART MARK T ,  FLICKINGER WILLIAM J ,  FRANCISCHELLI DAVID E ,  MEHRA RAHUL ,  MIN XIAOYI

    IPC: A61B18/14 ,  A61B17/00

    Abstract: A catheter assembly for treatment of cardiac arrhythmia, for example, atrial fibrillation, by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The catheter assembly includes a catheter body 22 and at least one electrode 26. The catheter body includes a proximal portion 28, an intermediate portion 30 and a distal portion 32. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and forms a substantially closed loop 34, parallel or transverse to the longitudinal axis. The at least one electrode 26 is disposed along the loop. With this configuration, the loop is axially directed into contact with the chamber wall about the vessel ostium. Upon energization, the electrode ablates a continuous lesion pattern about the vessel ostium, thereby electrically isolating the vessel from the chamber.

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