▎ 摘　　要

NOVELTY - Apparatus comprises a mixing catheter having hollow lumen separated from another hollow lumen, where the former hollow lumen and the latter hollow lumen are joined into an opening at a distal end of the mixing catheter. A mechanism is provided for mixing of precursors of the curable substance flowing in the former hollow lumen and the latter hollow lumen. A mechanism is provided for cleaving the curable substance from the mixing catheter. A mechanism is provided for anchoring the mixing catheter or preventing backflow of the precursors. A mechanism is provided for delivering the precursors, where the mechanism is provided for delivering the precursors being attached to the proximal end of the mixing catheter. USE - Apparatus for delivery of curable substance into vasculature or an organ. ADVANTAGE - The apparatus prevents backflow of liquid, unique ability to fill coronary vessels, prevents premature cure in the catheter before delivery, allows for controlled delivery of both solutions, and ensures mixing of the solutions for a homogeneous resulting material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for delivering curable substance, which involves providing an apparatus including a mixing catheter, a mechanism for mixing of precursors of the curable substance, a mechanism to cleave the curable substance from the mixing catheter, a mechanism to anchor the mixing catheter or prevent backflow of the precursors, and a mechanism to deliver the precursors; (2) a method for treating ventricular arrhythmia, which comprises injecting a biostable, biocompatible conductive hydrogel into a venous system of the heart, curing the conductive hydrogel, and then connecting a lead of a defibrillator or pacemaker to the biostable biocompatible conductive hydrogel; (3) a biostable, biocompatible conductive hydrogel for injection into a venous system or an organ, which comprises a crosslinked network formed by hydrophilic macromers, and an ions solvated in an aqueous phase of the hydrogel and conductive elements; and (4) a method for making a biostable, biocompatible conductive hydrogel for injection into a venous system or an organ, which involves combining precursor solution with another precursor solution. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the transvenous catheter delivery of the conductive hydrogel to the anterior interventricular vein.