Yonsei Med J.  2007 Aug;48(4):639-644. 10.3349/ymj.2007.48.4.639.

Mid-Term Results of Reconstruction of the Right Ventricular Outflow Tract Using Cryopreserved Homografts

• Youn YN
• Park HK
• Kim DK
• Park SY
• Yi G
• Park YH

• KMID: 2158169
• DOI: http://doi.org/10.3349/ymj.2007.48.4.639

Abstract

PURPOSE
Homograft benefits include excellent hemodynamics, resistance to infection, decreased thromboembolic events, ease of handling, and lack of need for anticoagulation. We examined the short and mid-term results of right ventricular outflow tract (RVOT) reconstruction using cryopreserved homografts. PATIENTS AND METHODS: From May 1998 to May 2005, 20 patients (male:female=10:10) underwent RVOT reconstruction using cryopreserved homografts. The median age was 23.8 years (range, 0.9 to 43.3 years) and the median body weight was 57kg (range, 7.3 to 80kg). Eighteen patients underwent re-operation after shunt or corrective operations. Homograft failure was defined as either re-operation for homograft replacement or patient death. Homograft dysfunction was defined as grade 3 or more than 3 of graft regurgitation and more than 40mmHg of transvalvular pressure gradient under echocardiographic examination. RESULTS: No operative mortality occurred and there were three major complications. Graft failure was observed in one male patient with tetralogy of Fallot. The 8-year freedom from graft failure was 87.5+/-11.7% and the 7-year freedom from graft dysfunction was 62.3+/-17.9%. Multivariable analysis revealed that the independent factor for graft dysfunction was age less than 10 years. In the analysis according to age group, the 7-year freedom from graft dysfunction in the group of patients older than 10 years was 100% and 25.0+/-21.7% in patients age 10 or younger (p= 0.03). CONCLUSION: Right ventricular outflow reconstruction using cryopreserved homografts provided excellent short and mid-term results in most patients in this study. However, in patients younger than 10 years old, homografts for RVOT reconstruction showed a high dysfunction rate at mid-term.

Keyword

Homograft; pulmonary regurgitation; right ventricular outflow

MeSH Terms

Adolescent
Adult
Child
Child, Preschool
Cryopreservation
Female
Heart Diseases/*surgery
Heart Ventricles/*transplantation
Humans
Infant
Intraoperative Complications
Male
Postoperative Complications
Transplantation, Homologous/adverse effects
Treatment Outcome

Figure

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  Fig. 1 Age distribution at the time of operation.

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  Fig. 2 Overall freedom from graft dysfunction.

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  Fig. 3 Freedom from graft dysfunction according to age. Straight line-age 10 years or less, dotted line-More than 10 years old.

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