Thorac Cardiovasc Surg 2007; 55(3): 156-162
DOI: 10.1055/s-2006-924627
Original Cardiovascular

© Georg Thieme Verlag KG Stuttgart · New York

Mechanical Aortic and Mitral Valve Replacement in Infants and Children

J. S. Sachweh1 , 3 , A. R. Tiete1 , 3 , E. G. Mühler2 , J. Groetzner1 , 3 , H. Gulbins3 , B. J. Messmer1 , S. H. Daebritz1 , 3
  • 1Department of Thoracic and Cardiovascular Surgery, Pediatric Cardiac Surgery, RWTH Aachen University Hospital, Aachen, Germany
  • 2Department of Pediatric Cardiology, RWTH Aachen University Hospital, Aachen, Germany
  • 3Cardiac Surgery, University Hospital Großhadern, Munich, Germany
Further Information

Publication History

received May 4, 2006

Publication Date:
05 April 2007 (online)

Abstract

Background: The aim of this study was to evaluate early and late outcomes after mechanical systemic heart valve replacement in pediatric patients. Methods: Between October 1981 and December 2003, 32 children (mean age 7.2 ± 5.4 years; 4 months - 15.9 years) underwent mechanical mitral (MVR, n = 17), aortic (AVR, n = 13) or double valve replacement (DVR, n = 2) with St. Jude Medical valves. Twenty-two patients (69 %) had undergone previous cardiac surgery. Anticoagulation self-management was used since 1995. Results: The operative mortality was 3.1 %. Perioperative complications were complete heart block (n = 5), ventricular fibrillation (n = 1) and myocardial infarction (n = 1) and were exclusively related to patients with MVR. Mean calculated valve size ratio (geometric prosthesis orifice area/normal valve size area) was 1.72 (1.07 - 2.85) for AVR and 1.4 (0.88 - 3.12) for MVR. Mean follow-up was 9.1 ± 6.6 years (range 0.4 - 23.2 years, cumulative 283 patient-years). There were two late deaths in patients with MVR. Actuarial survival after 10 years was 93.8 %. Late complications were endocarditis (n = 2), minor hemorrhagic event (n = 1), and stroke (n = 1). Anticoagulation self-management is well accepted by all patients/parents. Overall 10-year freedom from any anticoagulation-related adverse event with phenprocoumon was 89.1 % (1.2 %/patient year). Nine patients required reoperations: redo-MVR (outgrowth of prostheses (n = 3), pannus overgrowth (n = 2), closure of paravalvular leak after AVR (n = 2), partial aortic valve thrombosis (n = 1) and redo-DVR (n = 1 for endocarditis). Freedom from reoperation after 10 years was 80.9 %. Conclusions: Mechanical valve prostheses are a valuable option for left-sided heart valve replacement in pediatric patients. Perioperative morbidity was exclusively related to patients with MVR. Oversizing was often possible to avoid early reoperation for outgrowth. The operative mortality and long-term morbidity are acceptable. Anticoagulation self-management is safe and well accepted.

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MD Jörg S. Sachweh

Pediatric Cardiac Surgery
University Hospital

Pauwelsstraße 30

52074 Aachen

Germany

Phone: + 49 24 18 08 05 24

Fax: + 49 24 18 08 24 78

Email: jsachweh@ukaachen.de

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