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Heart Surgery

Percutaneous-endomyocardial-revascularization

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Percutaneous endomyocardial revascularization

Details

Inventors: Abela, George S.; Bowden, Russell W.;
Assignee: CorMedica (Natick, MA)
Primary Examiner: Jaworski; Francis
Assistant Examiner:
Attorney, Agent or Firm: Feeney; William L. Kerkam, Stowell, Kondracki & Clarke, P.C.

A system and method for percutaneous myocardial revascularization uses laser energy emitted from the distal end of a catheter. A technique for controlling beam direction allows the creation of channels in a patient's heart tissue with the channels having different orientations relative to the distal end. An arrangement provides for the creation of a plurality of channels at one time by simultaneous application of a plurality of beams of laser energy. A navigation arrangement uses two non-coplanar magnetic sensing coils in the distal end of the catheter cooperating with three sets of three magnetic field generating external coils (i.e., external to the patient). Each of the three sets is sequentially energized and the sensing coils in the distal end sense the magnetic fields established. A computer compares the sensed fields with the known sequence of energizing the external coils and thereby determines the position of the distal end. A pressure sensor in the catheter senses ventricular pressure in the patient's heart during and immediately after revascularization.

DETAILED DESCRIPTION Accordingly, it is a primary object of the present invention to provide a new and improved catheter and associated method for myocardial revascularization of a patient.
(As used herein, a patient may be a human or animal patient.
) A more specific object of the present invention is to provide a catheter and technique for percutaneous endomyocardial revascularization.
A further object of the present invention is to provide revascularization with a high degree of accuracy in positioning of new channels placed in the patient by providing highly accurate positioning and repositioning of a catheter.
Yet another object of the present invention is to provide treatment of diseased tissue of a patient with minimal impact on adjacent tissues.
A further object of the present invention is to provide myocardial revascularization without the need for opening the chest cavity.
Yet another object of the present invention is to provide endovascular myocardial revascularization without having to create a through channel with its associated bleeding and potential for clots damaging its effectiveness.
A further object of the present invention is to provide myocardial revascularization with flexibility in creating channels and/or patterns of channels.
A further object of the present invention is to provide myocardial revascularization with improved monitoring of heart conditions.
The above and other features of the present invention which will be more readily understood when the following detailed description is considered in conjunction with the accompanying drawings are realized by system for percutaneous myocardial revascularization having a catheter, the catheter having a proximal end and a distal end.
The distal end of the catheter includes: an applicator for revascularizing energy operable to revascularize a patient's heart, the revascularizing energy being non-mechanical energy; a navigation device operable to provide sensing of the position of the distal end and having wires carrying navigation signals (i

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