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Ann Thorac Surg 2000;69:597-601
© 2000 The Society of Thoracic Surgeons

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Original Articles

Surgical closure of apical ventricular septal defects through a right ventricular apical infundibulotomy

^a Departments of Cardiovascular Surgery and Pediatrics, University of Padova Medical School, Padova, Italy
^b Departments of Cardiology and Pathology, Children’s Hospital, and the Departments of Pediatrics and Pathology, Harvard Medical School, Boston, Massachusetts, USA

Address reprint requests to Dr Stella Van Praagh, Children’s Hospital, 300 Longwood Ave, Boston, MA 02115
e-mail: gaskill{at}a1.tch.harvard.edu

Background. We present a new understanding of the anatomic position of apical ventricular septal defects and its surgical relevance. These defects occur between the left ventricular apex and the infundibular apex, rather than between the left and right ventricular apices. Often a sizable apical recess, the infundibular apex lies anteriorly and inferiorly to the moderator band and is the most leftward part of the right ventricle.

Methods. Four patients (2 boys and 2 girls) with a mean age of 109 days (range, 48 to 217 days) underwent patch closure through an apical infundibulotomy, which allowed complete visualization of the muscular apical ventricular septal defect.

Results. There were no early or late deaths at operation. No significant residual shunt at ventricular level was detected by postoperative two-dimensional and Doppler echocardiography. Intraoperative comparison of right atrial and pulmonary arterial blood samples showed a difference of less than 5%. At a mean follow-up of 18 months, all the patients are asymptomatic and growing well.

Conclusions. The successful outcome of these 4 patients indicates that surgical closure of apical ventricular septal defects can be achieved safely and completely in early infancy through a limited right ventricular apical infundibulotomy. Long-term follow-up of these and similar patients is needed to provide further evaluation of this approach.

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