What is Morrow procedure?

What is Morrow procedure?

Ventricular septal myectomy for hypertrophic obstructive cardiomyopathy (HOCM) is otherwise known as Morrow procedure.

In Morrow procedure, a rectangular trough is created in the basal left ventricular septum from below the aortic valve to a point beyond the point of contact of the anterior mitral leaflet to the septum (point of SAM septal contact). It is the procedure of choice for symptomatic drug refractory HOCM, provided it is done in centers with adequate experience with the procedure.

Reference

1. Morrow AG, Reitz BA, Epstein SE, Henry WL, Conkle DM, Itscoitz SB, Redwood DR. Operative treatment in hypertrophic subaortic stenosis. Techniques, and the results of pre and postoperative assessments in 83 patients. Circulation 1975;52:88–102.