Hypertrophic obstructive cardiomyopathy. Late follow-up after ventricular myotomy-myectomy.

: A series of 25 patients with hypertrophic obstructive cardiomyopathy, isolated or associated with minor anomalies, were operated upon using a modified Morrow's procedure. The indication for operation was based on either the presence of severe symptoms despite treatment with beta-blocking agents, or a significant peak gradient of over 50 mmHg even in asymptomatic patients. All patients survived and none was lost to follow-up. Long-term results were evaluated with 2-dimensional echocardiography. Surgical versus pharmacological treatment is discussed, with particular consideration given to paediatric patients.