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Left ventricular outflow tract obstruction from mitral prosthesis
Insights
A rare case of left ventricular outflow tract obstruction occurred six years after mitral valve replacement. Surgical intervention involving aortic root enlargement and valve replacement successfully resolved the obstruction and improved patient symptoms.
Area of Science:
- Cardiovascular Surgery
- Cardiac Pathology
- Medical Device Complications
Background:
- Mitral valve replacement (MVR) is a common procedure for valvular heart disease.
- Post-MVR complications can be diverse and may manifest years after surgery.
- Left ventricular outflow tract (LVOT) obstruction is a critical condition affecting cardiac function.
Observation:
- A patient presented with symptoms suggestive of aortic valve disease six years post-MVR.
- Preoperative evaluations (clinical, echocardiographic, angiographic) indicated aortic valve pathology.
- Intraoperative findings revealed LVOT obstruction caused by the mitral prosthesis strut.
Findings:
- The primary cause of LVOT obstruction was identified as the mitral prosthesis strut impinging on the outflow tract.
- Surgical management included aortic root enlargement and aortic valve replacement.
- The patient experienced significant symptomatic and echocardiographic improvement post-procedure.
Implications:
- This case highlights a rare but serious complication of MVR, emphasizing the need for vigilant long-term follow-up.
- Prosthetic valve design and placement can influence the risk of LVOT obstruction.
- Early diagnosis and appropriate surgical intervention are crucial for favorable outcomes in such cases.
Abstract:
A case of left ventricular outflow tract obstruction six years following mitral valve replacement is presented. Clinical features, echocardiographic and angiographic studies preoperatively all suggested aortic valve disease. The diagnosis of left ventricular outflow tract obstruction by the strut of the mitral prosthesis was made intraoperatively. Enlargement of the aortic root and aortic valve replacement resulted in good symptomatic and echocardiographic improvement.