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Guidelines for sites linking to mayoclinic.orgA schematic illustration of the obstructive form of HCM before (left) and during (right) surgical septal myectomy. The surgeon performs the operation by making a small incision in the aorta (main vessel carrying blood away from the heart) and looking down at the septum through the aortic valve. A variable, patient-specific amount of heart muscle from the septum is removed in this manner.
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