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[Echocardiographic observations in malfunctioning heart valves due to thrombosis (author's transl)]
Insights
Echocardiography can detect thrombosis obstructing prosthetic heart valves. This imaging technique helps differentiate valvular dysfunction from left ventricular issues in deteriorating patients post-valve replacement.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Prosthetic heart valve replacement is a common procedure.
- Thrombosis can lead to obstruction and malfunction of prosthetic heart valves.
- Differentiating causes of deterioration after valve replacement is clinically important.
Observation:
- Two patients presented with prosthetic mitral valve obstruction due to thrombosis.
- In one patient, a thrombus on a Smeloff-Cutter mitral prosthesis impeded ball excursion, visualized by echocardiography.
- In the second patient, thrombosis of a Lillehei-Kaster mitral prosthesis caused delayed and restricted disc opening.
Findings:
- Echocardiography effectively identified thrombus formation causing mechanical obstruction in prosthetic mitral valves.
- The imaging modality revealed specific patterns of dysfunction, including incomplete ball movement and delayed disc opening.
- Comparison with postoperative echocardiograms aided in detecting prosthesis malfunction.
Implications:
- Echocardiography is a valuable tool for diagnosing prosthetic valve thrombosis in patients with post-operative deterioration.
- This technique aids in distinguishing valvular dysfunction from left ventricular muscular insufficiency.
- Early detection of malfunctioning prostheses through echocardiography can guide timely clinical management and improve patient outcomes.
Abstract:
The study includes two patients with obstruction of prosthetic heart valves by thrombosis. In the first patient, a thrombus attached to the ventricular side of the cage of a Smeloff-Cutter mitral prosthesis caused incomplete excursion of the ball in most cardiac cycles, which was detected by echocardiography. In the second patient a thrombosis of the atrial and ventricular side of a Lillehei-Kaster mitral prosthesis delayed opening of the disc. The initial part of the opening movement was "rounded", the excursion of the disk diminished. The cases presented indicate that in patients whose condition deteriorates after prosthetic valve replacement, echocardiography can help identify the cause. In particular, the technique makes it possible to differentiate between valvular dysfunction and muscular insufficiency of the left ventricle. Comparison with recordings obtained in the early postoperative period facilitate the detection of a malfunctioning prosthesis.