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Injectable conducti...
Injectable conductive hydrogel restores conduction through ablated myocardium
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- van Zyl, Martin (author)
- Mayo Clinic
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- Pedrotty, Dawn M. (author)
- University of Pennsylvania
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- Karabulut, Erdem, 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kuzmenko, Volodymyr, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sämfors, Sanna, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Livia, Christopher (author)
- Mayo Clinic
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- Vaidya, Vaibhav (author)
- Mayo Clinic
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- Sugrue, Alan (author)
- Mayo Clinic
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- McLeod, Christopher J. (author)
- Mayo Clinic
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- Behfar, Atta (author)
- Mayo Clinic
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- Asirvatham, Samuel J. (author)
- Mayo Clinic
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- Gatenholm, Paul, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kapa, Suraj (author)
- Mayo Clinic
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(creator_code:org_t)
- 2020-10-05
- 2020
- English.
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In: Journal of Cardiovascular Electrophysiology. - : Wiley. - 1045-3873 .- 1540-8167. ; 31:12, s. 3293-3301
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Abstract
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- Introduction Therapies for substrate-related arrhythmias include ablation or drugs targeted at altering conductive properties or disruption of slow zones in heterogeneous myocardium. Conductive compounds such as carbon nanotubes may provide a novel personalizable therapy for arrhythmia treatment by allowing tissue homogenization. Methods A nanocellulose carbon nanotube-conductive hydrogel was developed to have conduction properties similar to normal myocardium. Ex vivo perfused canine hearts were studied. Electroanatomic activation mapping of the epicardial surface was performed at baseline, after radiofrequency ablation, and after uniform needle injections of the conductive hydrogel through the injured tissue. Gross histology was used to assess distribution of conductive hydrogel in the tissue. Results The conductive hydrogel viscosity was optimized to decrease with increasing shear rate to allow expression through a syringe. The direct current conductivity under aqueous conduction was 4.3 x 10(-1) S/cm. In four canine hearts, when compared with the homogeneous baseline conduction, isochronal maps demonstrated sequential myocardial activation with a shift in direction of activation to surround the edges of the ablated region. After injection of the conductive hydrogel, isochrones demonstrated conduction through the ablated tissue with activation restored through the ablated tissue. Gross specimen examination demonstrated retention of the hydrogel within the tissue. Conclusions This proof-of-concept study demonstrates that conductive hydrogel can be injected into acutely disrupted myocardium to restore conduction. Future experiments should focus on evaluating long-term retention and biocompatibility of the hydrogel through in vivo experimentation.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Textil-, gummi- och polymermaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Textile, Rubber and Polymeric Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Medicinsk bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Medical Biotechnology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinsk bioteknologi -- Biomaterialvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Medical Biotechnology -- Biomaterials Science (hsv//eng)
Keyword
- carbon nanotubes
- injectable hydrogel
- translational research
- electroanatomic mapping
- arrhythmias
Publication and Content Type
- art (subject category)
- ref (subject category)
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van Zyl, Martin
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Pedrotty, Dawn M ...
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Karabulut, Erdem ...
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Kuzmenko, Volody ...
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Sämfors, Sanna, ...
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Livia, Christoph ...
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Vaidya, Vaibhav
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Sugrue, Alan
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McLeod, Christop ...
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Behfar, Atta
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Asirvatham, Samu ...
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Gatenholm, Paul, ...
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Kapa, Suraj
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Textile Rubber a ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Industrial Biote ...
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and Medical Biotechn ...
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Medical Biotechn ...
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and Biomaterials Sci ...
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Journal of Cardi ...
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Chalmers University of Technology