Septal Myectomy
Septal Myectomy - Related Videos
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Endoscopic septoplasty is a time-honored surgical procedure with multiple variations. This paper focuses on a step-by-step surgical approach to perform a modified septoplasty procedure known as limited two-line resection. This surgical technique can be applied to correct a deviated nasal septum in the absence of an external nasal deformity.
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Murine Fetal Echocardiography
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Fetal and perinatal death is a common feature when studying genetic alterations affecting cardiac development. High-frequency ultrasound imaging has improved 2-D resolution and can provide excellent information on early cardiac development and is an ideal method to detect the impact on cardiac structure and function prior to death.
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Here, we present a protocol for recording rhythmic neuronal network theta and gamma oscillations from an isolated whole hippocampal preparation. We describe the experimental steps from extraction of the hippocampus to details of field, unitary and whole-cell patch clamp recordings as well as optogenetic pacing of the theta rhythm.
FAQs
The benefit comes from changing the geometry of the left ventricular outflow tract rather than removing muscle indiscriminately. Excision of selected septal tissue creates more space for blood to leave the ventricle, which can reduce the pressure gradient across the narrowed pathway. This explains why the operation targets a specific region of the interventricular septum.
By enlarging the left ventricular outflow tract, septal myectomy can reduce the obstruction associated with systolic anterior motion of the mitral valve. The relevant mechanism is anatomical: excess septal muscle restricts the outflow route and contributes to abnormal valve movement during contraction. Addressing that structural narrowing may relieve both components of the obstruction.
A lower pressure gradient indicates that blood encounters less resistance while leaving the left ventricle. In the setting of obstructive hypertrophic cardiomyopathy, this change reflects improved passage through the outflow tract after targeted septal tissue removal. Clinically, reducing the gradient is important because it links correction of the structural narrowing with improved cardiac performance.
The procedure is particularly relevant when obstruction remains severe despite medication. This selection reflects the different problems addressed by each approach: medication may be insufficient when excess septal tissue continues to narrow the outflow tract, whereas surgery directly modifies that anatomy. Appropriately selected patients may therefore gain symptom relief by treating the structural source of impaired flow.
The central goals are to remove targeted thickened septal tissue, enlarge the left ventricular outflow tract, and reduce the pressure gradient limiting blood ejection. Because the operation is performed as open-heart surgery, the intervention focuses on precise anatomical correction rather than generalized muscle removal. Its intended result is relief of obstruction caused by the abnormal septal thickening.
In appropriately selected patients, septal myectomy can improve exertional symptoms and cardiac function by relieving severe outflow obstruction. The expected clinical value follows from the mechanical correction: enlarging the passage for blood reduces the burden created by the narrowed tract and may also lessen obstruction associated with systolic anterior motion of the mitral valve.