Novel percutaneous technique for creation of porcine model of tricuspid regurgitation via two routes

• Published in: Journal of international medical research Vol. 52; no. 3; p. 3000605241233524
• Main Authors: Oh, Ji Soo, Kim, Ga Yun, Kim, Seok Hyun, Lee, Sang Hyun, Park, Yong Hyun, Kim, June Hong, Chon, Min Ku
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.03.2024; Sage Publications Ltd; SAGE Publishing
• Subjects: Animals; Cardiomegaly; Echocardiography; Heart Atria - diagnostic imaging; Preclinical Study; Swine; Tomography; Tricuspid Valve Insufficiency - diagnostic imaging; Tricuspid Valve Insufficiency - surgery; Vena Cava, Superior; Animal disease model; survival model; functional tricuspid regurgitation; tricuspid valve disease; loop wire cutting method; regurgitation jet
• ISSN: 0300-0605; 1473-2300; 1473-2300
• DOI: 10.1177/03000605241233524

Objective To develop an experimental porcine model of tricuspid regurgitation using two induction routes: the inferior vena cava and superior vena cava. Methods Tricuspid regurgitation was generated using the loop wire cutting method. The tricuspid regurgitation jet direction was controlled by accessing the valve through the inferior (n = 7) or superior (n = 6) vena cava. The occurrence, direction, and progression of tricuspid regurgitation were assessed postoperatively, and echocardiography was performed at 4 to 6 weeks. Right heart dilatation was assessed using computed tomography after 6 weeks. Results Moderate to severe or torrential tricuspid regurgitation occurred immediately after the procedure in 12 of 13 animals. The jet was directed toward the septum in five of seven animals in the inferior vena cava group and toward the posterolateral side in four of six animals in the superior vena cava group. The dimensions of the right heart (right atrium, ventricle, and tricuspid valve annulus) were significantly enlarged at the 4- to 6-week follow-up echocardiographic examination and confirmed to be enlarged by computed tomography, independent of the route used. Conclusion The loop wire cutting method successfully induced a disease model of tricuspid regurgitation while controlling the regurgitation jet direction via two procedural routes.