The following results have been reported from a successful septal myomectomy:

Potential complications of septal myomectomy include:

• Excessive removal of septal muscle may create a ventricular septal defect, or hole in the wall between the right ventricle and left ventricle.
  
  
• Possible surgical damage to the aortic valve that necessitates aortic valve replacement at a later date.
  
  
• Possible damage to the heart’s electrical conduction system, which may require permanent pacing. This occurs in about 5 to 10 percent of patients.

There is also some risk associated with the open-heart surgery itself, especially among older people and/or those with more severe conditions and surgeries that involve use of the heart lung machine. About 5 to 10 percent of patients experience heart attacks, strokes or “mini-strokes” (transient ischemic attacks) either during or shortly after open-heart surgery. Other complications include bleeding and infection. 

 Conventional open-heart surgery, which has been around for almost 50 years, requires the use of the heart-lung machine to take over the heart’s functions during surgery so the heart can be carefully stopped for treatment. Since the advent of open-heart surgery, the techniques have been refined to make it safer and less-invasive. Today, open-heart surgery has an excellent track record, with the incidence of side effects approaching 1 percent in some surgeries.