Residual and recurrent gradients after septal myectomy for hypertrophic cardiomyopathy—mechanisms of obstruction and outcomes of reoperation

The aims of the present study were to identify the mechanisms of residual or recurrent left ventricular outflow tract obstruction in patients undergoing repeat septal myectomy for hypertrophic cardiomyopathy and to assess the early and late results of reoperation.From January 1980 to June 2012, we performed 52 repeat myectomies in 51 patients. We reviewed the medical records and preoperative transthoracic echocardiograms to evaluate the adequacy...