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Double-chambered left ventricle: submitral accessory valvular tissue causing inlet and outlet obstruction
M Albertucci1, R M Lang, R B Karp
1Department of Cardiac Surgery, University of Chicago, IL 60637.
Summary
A large subaortic ridge caused severe left ventricular obstruction in a patient. Surgical resection of this ridge successfully improved blood flow and heart function.
Area of Science:
- Cardiology
- Cardiac Surgery
- Medical Imaging
Background:
- Congenital heart anomalies can lead to complex hemodynamic challenges.
- Subaortic stenosis, a form of left ventricular outflow tract obstruction, requires careful diagnosis and management.
Observation:
- A patient presented with a large ridge of muscular and fibrous tissue below the mitral valve.
- This ridge divided the left ventricle into two chambers, causing significant inlet and outlet obstruction.
- Doppler echocardiography confirmed obstruction during both ventricular filling and ejection phases.
Findings:
- Echocardiography revealed the obstruction was positioned in series with the mitral valve apparatus.
- Surgical intervention involved the resection of a substantial portion of the obstructive subaortic ridge.
- Post-operative assessments demonstrated significant morphologic and hemodynamic improvements.
Implications:
- Surgical resection of subaortic ridges is an effective treatment for relieving left ventricular obstruction.
- Accurate echocardiographic assessment is crucial for diagnosing and planning surgical repair of such anomalies.
- Restoration of normal ventricular morphology and hemodynamics can be achieved through timely surgical intervention.