Cardiac surgery
The septal myectomy procedure has been described in detail in our
previous publication.8 Indications for MB intervention
mainly include chest pain and the degree and length of compression of
MB. In addition, the operative procedure is mainly determined by the
degree and length of compression. For patients with relatively shallow
and short MB, myocardial unroofing was performed. However, for those
with deep and extensive MB, CABG was conducted. Moreover, MB was not
treated for patients with no symptoms of chest pain and with shallow and
short MB. After septal myectomy and aortic incision suturing, we
performed myocardial unroofing under the circumstance of cardiac arrest.
First, we determined the position of the MB and then cut the epicardium
right above the coronary artery and maintained its integrity (Figure 2).
After this unroofing, 6-0 Prolene was used to continuously suture the
adipose tissue on the surface of the heart. CABG was performed according
to previous studies, and other related operations performed according to
preoperative evaluation and intraoperative exploration. Two grafts,
namely, LIMA and SVG, were used in all CABG procedures.