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Transcatheter pulmonary valve replacement: a new polycarbonate urethane valve.
- Source :
- European Journal of Cardio-Thoracic Surgery; May2021, Vol. 59 Issue 5, p1048-1056, 9p
- Publication Year :
- 2021
-
Abstract
- Open in new tab Download slide Open in new tab Download slide OBJECTIVES Transcatheter pulmonary valve replacement has become a valid treatment option for right ventricular outflow tract diseases. However, some limitations occur in patients with wide, compliant right ventricular outflow tracts that might be amenable to treatment with self-expanding valved protheses. An experimental ovine study was designed to evaluate a novel dip-coated, low-profile trileaflet polycarbonate urethane (PCU) heart valve mounted into a self-expandable nitinol stent. METHODS The PCU valves were produced by a dip-coating technique, mounted in a conical-shaped nitinol stent and provided with a leaflet thickness of 100–150 µm. The valved stents were implanted percutaneously via transfemoral access in 6 consecutive sheep divided into 2 groups. Three animals were followed up for 1 month and the remainder, for 6 months. Angiographic measurements and transthoracic echocardiography were performed before and after implantation and at the end of the 1- or 6-month observation period, respectively. RESULTS Orthotopic positioning of the valve was achieved in all animals. All except 1 had competent valves during the follow-up period. The peak-to-peak gradient across the PCU valved stents was 4.6 ± 1.0 mmHg after 1 month and 4.4 ± 2.3 mmHg after 6 months of follow-up. Macroscopic and microscopic post-mortem evaluation indicated good morphological and structural results. There were no stent fractures, leaflet calcification or thrombus formation. CONCLUSIONS This study demonstrates successful transcatheter pulmonary valve replacement with a novel dip-coated valved nitinol stent. The trileaflet PCU prostheses indicated good functional and biocompatible properties after a 6-month observation period. [ABSTRACT FROM AUTHOR]
- Subjects :
- PULMONARY valve
URETHANE
POLYCARBONATES
HEART valves
VALVES
MITRAL valve prolapse
Subjects
Details
- Language :
- English
- ISSN :
- 10107940
- Volume :
- 59
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- European Journal of Cardio-Thoracic Surgery
- Publication Type :
- Academic Journal
- Accession number :
- 150252487
- Full Text :
- https://doi.org/10.1093/ejcts/ezaa479