Devices and methods for treating cardiac pathologies

• US 20060106442A1
• Filed: 05/19/2005
• Published: 05/18/2006
• Est. Priority Date: 05/19/2004
• Status: Abandoned Application

• Current Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford University)
• Original Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford University)
• Inventors: Francis, Daniel, Anderson, Evan, Johnson, Jeremy, Walke, Amrish, Richardson, Kelly, Woo, Russell
• Application Number:
  US11/133,581
• Publication Number:
  US 20060106442A1
• Time in Patent Office: Days
• US Class Current: 607/119
• CPC Class Codes: A61N 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium
• CPC Class Codes: A61N 1/3627 for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy

Abstract

The invention relates to heart treatment devices and methods for performing diagnostic or therapeutic procedures in the region between a bodily organ and a covering of the bodily organ. The invention can be used for example to perform a diagnostic or therapeutic procedure in the pericardial space.

Claims

1. A catheter system for positioning an intrapericardial electrical catheter against a site upon the surface of a mammalian heart, the mammalian heart having an inner surface and an outer surface defining a wall, the catheter system comprising:

a first tube, the first tube having a proximal end and a distal end, and defining a first lumen within the longitudinal axis of the first tube,

an attaching means having a proximal end and a distal end, wherein the proximal end of the attaching means is affixed to the first tube at or near the distal end of the first tube and the distal end of the attaching means is adapted for attaching the first tube to the wall of the mammalian heart,

a second tube, the second tube having a distal end adapted to puncture the wall of the mammalian organ and having a proximal end, wherein the second tube is adapted for placement within the first lumen, and

an intrapericardial electrical catheter having a distal end and a proximal end, defining a second lumen within the longitudinal axis of the intrapericardial electrical catheter, wherein the intrapericardial electrical catheter is adapted for insertion through the first lumen, and wherein the distal end of the intrapericardial electrical catheter is shaped and adapted for placement against a site upon the surface of the mammalian heart.

2. The catheter system of claim 1, wherein the attaching means is selected from the group consisting of stylet, a hook, a clip, a staple, an adhesive, a coil, a barb, a serrated blade or knife, a threaded screw, and a vacuum device.

3. The catheter system of claim 1, wherein the distal end of the intrapericardial electrical catheter further comprises attaching means selected from the group consisting of stylet, a hook, a clip, a staple, an adhesive, a coil, a barb, a serrated blade or knife, a threaded screw, and a vacuum device.

4. The catheter system of claim 1, wherein the first tube further comprises at least one electrode.

5. The catheter system of claim 4 wherein the at least one electrode is selected from the group consisting of a pacing electrode and a defibrillating electrode.

6. The catheter system of claim 1, the first tube further comprising a flexing element.

7. The catheter system of claim 1, wherein the first catheter further comprises a gasket ring, wherein the gasket ring is affixed near the distal end of the first catheter and wherein the gasket ring has a diameter more than that of the first catheter.

8. The catheter system of claim 1, the proximal end and the distal end of the second tube defining a third lumen.

9. The catheter system of claim 1, further comprising a guide-wire.

10. The catheter system of claim 1 wherein the intrapericardial electrical catheter is concentrically disposed within the first lumen and comprises at least one electrode, and the electrode is in electrical conductivity to a power source at or near the proximal end of the intrapericardial electrical catheter.

11. The catheter system of claim 10 wherein the first catheter further comprises at least one second electrode, the second electrode being disposed at or near the distal end of the second catheter and is in electrical conductivity to a power source at or near the proximal end of the first tube and wherein the wall of the mammalian organ conducts a current when a potential difference is created between the first electrode and the second electrode using the power source.

12. The catheter system of claim 11, wherein the potential difference is not more than about 2.5 V at 0.5 ms.

13. The catheter system of claim 1, wherein the distal end of the intrapericardial electrical catheter further comprises a marker, the marker selected from the group consisting of a dye, a radio-opaque material, a magnet, and an ion source.

14. The catheter system of claim 3 wherein the attaching means are adapted for securing the intrapericardial electrical catheter to a heart wall

15. The catheter system of claim 1 wherein the catheter system further optionally comprises a catheter selected from the group consisting of an ablation catheter, a cryogenic catheter, a drug-delivery catheter, and a cell-delivering catheter.

16. The catheter system of claim 1 wherein the intrapericardial electrical catheter further comprising at least one electrode, wherein the electrode is selected from the group consisting of a pacing electrode and a defibrillating electrode.

17. A method of using the catheter system of claim 1 to treat an individual having a cardiac pathology, the method comprising the steps of:

(i) providing an individual having a cardiac pathology,

(ii) providing the catheter system of claim 1,

(iii) advancing the first tube through the thoracic circulatory system, the thoracic circulatory system selected from the group consisting of the inferior vena cava, the superior vena cava, the carotid sinus, the right atrial appendage of the heart, the right atrium, the left atrium, the right ventricle, and the left ventricle of the individual,

(iv) advancing the distal end of the first tube against the inner wall of the right ventricle,

(v) rotating and advancing the first tube and optionally engaging the coil with the tissue of the myocardium whereby the coil punctures and attaches to the myocardium and anchoring the system in the myocardium thereby,

(vi) advancing the second tube (through the first lumen and puncturing the myocardium,

(vii) advancing the second tube through the punctured myocardium and penetrating the myocardium thereby,

(viii) advancing the second tube through the myocardium and penetrating the outer surface of the myocardium,

(ix) advancing the intrapericardial electrical catheter through the first lumen,

(x) advancing the intrapericardial electrical catheter across the outer surface of the myocardium to a site on the outer surface of the myocardium, and

(xi) operating the intrapericardial electrical catheter, thereby treating the individual having a cardiac pathology and that results in the patient having an improved heart function.

18. The method of claim 17 further comprising a step of flexing the first tube upon egress from the myocardium.

19. The method of claim 17 further comprising a step of counter-rotating and withdrawing the first tube and disengaging the coil from the myocardium.

20. The method of claim 17 further comprising a step of advancing at least one guidewire through the second tube.

21. The method of claim 20 wherein the guidewire is selected from the group consisting of a 0.035″

guidewire and a 0.014″

guidewire and the guidewire advanced through the second tube is a 0.035″

guidewire, further comprising the steps of (xii) advancing a sheath over the 0.035″

guidewire, the sheath having a lumen, (xiii) removing the 0.035″

guidewire, (xiv) advancing a 0.014″

guidewire through the lumen of the sheath, and (xv) removing the sheath.

22. A system for diagnosing, preventing or treating a cardiac pathology by perforating through a cardiac tissue and placing a medical device or fluid in a heart chamber comprising:

a) an elongated, tubular delivery device having a delivery device lumen extending from a delivery device proximal region to a delivery device distal region and a distal fixation mechanism at the delivery device distal region adapted to be advanced into the heart and fixed to a selected site on the heart wall;

b) an elongated perforating device having an perforating device distal tip adapted to be advanced through the delivery device lumen and perforate through the cardiac tissue into the heart chamber to form a perforation; and

c) an elongate medical device for diagnosing, preventing or treating a cardiac pathology to be advanced through the perforation into the heart chamber.

23. The system of claim 22 wherein the cardiac pathology is an electrophysiological pathology

24. A system for diagnosing, preventing or treating a cardiac pathology by perforating through a thoracic vascular tissue and placing a medical device or fluid in a heart chamber comprising:

a) an elongated, tubular delivery device having a delivery device lumen extending from a delivery device proximal region to a delivery device distal region;

b) an elongated perforating device having an perforating device distal tip adapted to be advanced through the delivery device lumen and perforate through the thoracic vascular tissue into the heart chamber to form a perforation; and

c) an elongate medical device for diagnosing, preventing or treating a cardiac pathology to be advanced through the perforation into the heart chamber.

25. The system of claim 24 wherein the cardiac pathology is an electrophysiological pathology.

26. A system for delivering electrical energy to multiple cardiac locations by perforating through a cardiac tissue and placing a medical device comprising:

a) an elongated, tubular delivery device having a delivery device lumen extending from a delivery device proximal region to a delivery device distal region;

b) an elongated perforating device having an perforating device distal tip adapted to be advanced through the delivery device lumen and perforate through the cardiac tissue into the pericardial space to form a perforation; and

c) an elongate medical device for delivering electrical energy to multiple cardiac locations to be advanced through the perforation into the pericardial space, wherein the elongate medical device comprises two or more distal electrodes for delivering electrical energy and two or more proximal electrodes for delivering electrical energy.