[An unusual type of mid-ventricular obstruction. A discussion of the findings]

The authors report a case of left-sided mid-ventricular obstruction which was completely different from the usual type of obstructive cardiomyopathy, and had asymetrical hypertrophy of the septum demonstrable both by angiocardiography and macroscopically. Complete clinical and haemodynamic recovery followed left ventricular myectomy with replacement of the mitral valve (one year's follow-up).