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Does a ventriculotomy have deleterious effects following palliation in the Norwood procedure using a shunt placed from the right ventricle to the pulmonary arteries?

Published online by Cambridge University Press:  23 January 2007

Eric M. Graham ,
Andrew M. Atz ,
Scott M. Bradley ,
Mark A. Scheurer ,
Varsha M. Bandisode ,
Antonio Laudito  and
Girish S. Shirali
Eric M. Graham
Affiliation:
Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina, United States of America
Andrew M. Atz
Affiliation:
Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina, United States of America
Scott M. Bradley
Affiliation:
Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
Mark A. Scheurer
Affiliation:
Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina, United States of America
Varsha M. Bandisode
Affiliation:
Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina, United States of America
Antonio Laudito
Affiliation:
Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
Girish S. Shirali
Affiliation:
Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, South Carolina, United States of America
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Abstract

Introduction: A recent modification to the Norwood procedure involving a shunt placed directly from the right ventricle to the pulmonary arteries may improve postoperative haemodynamics. Concerns remain, however, about the potential problems produced by the required ventriculotomy. Methods: We compared 76 patients with hypoplastic left heart syndrome who underwent the Norwood procedure, 35 receiving a modified Blalock-Taussig shunt and the remaining 41 a shunt placed directly from the right ventricle to the pulmonary arteries. We reviewed their subsequent progress through the second stage of palliation. A single observer graded right ventricular function, and the severity of tricuspid regurgitation, based on blinded review of the most recent echocardiograms prior to the second stage of palliation. Results: At the time of catheterization prior to the second stage, patients with a shunt placed from the right ventricle to the pulmonary arteries, rather than a modified Blalock-Taussig shunt, had higher arterial diastolic blood pressure, at 44 versus 40 millimetres of mercury, p equal to 0.02, lower ventricular end diastolic pressures, at 8 versus 11 millimetres of mercury, p equal to 0.0002, and larger pulmonary arteries as judged using the Nakata index, at 270 versus 188 millimetres squared per metres squared, p equal to 0.009. There was no difference in qualitative ventricular systolic function or tricuspid regurgitation between groups. No differences were found between groups during the hospitalization following the second stage of palliation. A trend towards improved survival to the second stage was seen following the construction of a shunt from the right ventricle to the pulmonary arteries. Conclusions: Construction of a shunt from the right ventricle to the pulmonary arteries is associated with lower right ventricular end diastolic pressures, larger pulmonary arterial size, and higher systemic arterial diastolic pressures. No apparent deleterious effects of the right ventriculotomy were observed in terms of qualitative ventricular systolic function or tricuspid regurgitation.

Keywords

Hypoplasia of the left heartcardiac surgeryechocardiography
Type
Original Article
Information
Cardiology in the Young , Volume 17 , Issue 2 , April 2007 , pp. 145 - 150
Copyright
© 2007 Cambridge University Press

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