Related Experiment Videos
[Elective prosthetic valve reoperation to relieve unacceptably high gradient].
1Second Department of Surgery, Okayama University School of Medicine.
Kyobu Geka. the Japanese Journal of Thoracic Surgery
|June 1, 1990
Summary
High pressure gradients were observed in several Lillehei-Kaster, Omniscience, and Omnicarbon aortic valves, leading to prosthesis removal and improved patient outcomes post-reoperation. Cautious follow-up is recommended for patients receiving these valve prostheses.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Clinical Medicine
Context:
- Aortic valve replacement is a common procedure.
- Prosthetic heart valves are used to restore cardiac function.
- Hemodynamic performance of prosthetic valves is critical for patient outcomes.
Purpose:
- To evaluate the pressure gradients of Lillehei-Kaster, Omniscience, and Omnicarbon valves in the aortic position.
- To identify prosthetic valves with unacceptably high gradients.
- To assess the clinical impact of high gradients and subsequent reoperation.
Summary:
- Doppler echocardiography assessed pressure gradients in 46 patients with Lillehei-Kaster (13), Omniscience (26), and Omnicarbon (7) aortic valves.
- Twenty-three patients (50%) exhibited high gradients, necessitating the removal of seven prostheses due to valve design issues.
- Reoperation led to improvements in left ventricular function and patient symptoms.
Impact:
- High gradients across specific aortic valve prostheses can compromise clinical outcomes.
- Prompt identification and management of problematic valve designs are crucial.
- Long-term, cautious follow-up is advised for patients with these valve prostheses.