SYSTEMS, DEVICES, AND METHODS FOR FORMING AN ANASTOMOSIS
Disclosed herein are systems, devices, and methods for treating heart failure. In some variations, a catheter for forming an anastomosis in a heart may comprise a first catheter comprising an electrode. A second catheter may be slidably disposed within the first catheter. The second catheter may comprise a barb and a dilator comprising a mating surface configured to engage the electrode.
1 . A system for forming an anastomosis in a heart, comprising:
a first catheter comprising an electrode; and
a second catheter slidably disposed within the first catheter, the second catheter comprising a barb and a dilator comprising a mating surface configured to engage the electrode.
2 . The system of claim 1 , wherein the barb is disposed within a lumen of the electrode when the mating surface engages the electrode.
3 . The system of claim 1 , wherein an outer diameter of the dilator is less than an outer diameter of the electrode.
4 . (canceled)
5 . The system of claim 1 , wherein the second catheter defines a longitudinal axis, wherein the barb comprises at least one projection comprising a first portion and a second portion, the first portion angled relative to the second portion.
6 . The system of claim 5 , wherein a length of the first portion to a length of the second portion is in a ratio between about 2:3 and about 1:5.
7 . The system of claim 5 , wherein the second portion comprises a length between about 0.1 mm and about 2 cm.
8 .- 16 . (canceled)
17 . The system of claim 1 , wherein a length of the barb is between about 0.1 mm and about 5 cm.
18 . The system of claim 1 , wherein the electrode and the mating surface are configured to compress tissue therebetween.
19 . The system of claim 1 , wherein the second catheter defines a longitudinal axis, and the mating surface is non-perpendicular and non-parallel to the longitudinal axis.
20 .- 31 . (canceled)
32 . The system of claim 1 , wherein the dilator comprises a fluid port configured to output a contrast agent.
33 .- 34 . (canceled)
35 . The system of claim 1 , wherein the first catheter comprises a contrast agent lumen.
36 .- 37 . (canceled)
38 . The system of claim 1 , wherein the electrode comprises a fluid port configured to output a contrast agent.
39 .- 41 . (canceled)
42 . The system of claim 1 , wherein the dilator comprises an echogenic region comprising one or more recesses or protrusions comprising a diameter of between about 5 μm and about 100 μm.
43 .- 48 . (canceled)
49 . The system of claim 1 , further comprising a first catheter actuator configured to deflect a distal portion of the first catheter, the first catheter actuator electrically coupled to the electrode.
50 .- 53 . (canceled)
54 . The system of claim 1 , wherein the mating surface defines a recess configured to receive a distal end of the electrode.
55 . The system of claim 54 , wherein the electrode is configured to electrically short when the electrode engages the recess of the mating surface.
56 .- 58 . (canceled)
59 . The system of claim 1 , wherein the mating surface comprises a conductive portion.
60 . The system of claim 1 , wherein a proximal portion of the dilator is arranged within a lumen of the electrode when the mating surface engages the electrode.
61 .- 97 . (canceled)
98 . A system for forming an anastomosis in a heart, comprising:
a first catheter comprising an electrode; and
a second catheter slidably disposed within the first catheter, the second catheter comprising a barb and a dilator, wherein a proximal portion of the dilator comprises a first step portion comprising a first diameter and a second step portion comprising a second diameter greater than the first diameter, the first step portion proximal to the second step portion.
99 . A system for forming an anastomosis in a heart, comprising:
a first catheter comprising an electrode; and
a second catheter slidably disposed within the first catheter, the second catheter comprising a barb and a dilator, wherein the barb is enclosed within a lumen of the electrode when the dilator engages the electrode.
100 .- 103 . (canceled)