Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/11270
Title: Impact of prosthesis--patient mismatch after mitral valve replacement: a multicentre analysis of early outcomes and mid-term survival.
Authors: Shi, William Y;Yap, Cheng-Hon;Hayward, Philip A R;Dinh, Diem T;Reid, Christopher M;Shardey, Gilbert C;Smith, Julian A
Affiliation: Department of Cardiac Surgery, Austin Hospital, University of Melbourne, Melbourne, Australia.
Issue Date: 20-May-2011
Citation: Heart (british Cardiac Society) 2011; 97(13): 1074-81
Abstract: Prosthesis-patient mismatch (PPM) is characterised by the effects of inadequate prosthesis size relative to body surface area (BSA). It is uncertain whether PPM after mitral valve replacement impacts upon clinical outcome. This was examined in an Australian population.From 2001 to 2009, 1006 mechanical and bioprosthetic mitral valves were implanted across 10 institutions. Effective orifice areas (EOA) were obtained from a literature review of in vivo echocardiographic data. Absent, moderate and severe PPM was defined as an indexed EOA (EOA/BSA) of >1.20 cm(2)/m(2), >0.90 to ≤1.20 cm(2)/m(2) and ≤0.9 cm(2)/m(2), respectively. Early outcomes and 7-year survival were compared between these three groups.PPM was absent in 34%, moderate in 53% and severe in 13% of patients. Patients with PPM were more likely to be male (42% vs 52% vs 62%, p<0.0001) and obese (14% vs 20% vs 56%, p<0.0001). Postoperatively there was similar 30-day mortality (5% vs 5% vs 6%, p=0.83) and early any mortality/morbidity (24% vs 27% vs 29%, p=0.40). Seven-year survival was similar between groups (72±4.1% vs 76±3.2% vs 69±10.3%, p=0.76). PPM did not predict adverse events after logistic and Cox regressions with and without propensity score adjustment. Subgroup analyses of those with isolated mitral valve surgery, patients with preoperative congestive heart failure and non-obese patients failed to show an association between PPM and mid-term mortality.Overall, PPM was not associated with poorer early outcomes or mid-term survival. Oversizing valves may be technically hazardous and do not yield superior outcomes. Easier implantation by appropriate sizing appears justified.
Internal ID Number: 21602523
URI: http://ahro.austin.org.au/austinjspui/handle/1/11270
DOI: 10.1136/hrt.2010.219576
URL: http://www.ncbi.nlm.nih.gov/pubmed/21602523
Type: Journal Article
Subjects: Aged
Epidemiologic Methods
Female
Heart Valve Diseases.mortality.surgery
Heart Valve Prosthesis.adverse effects
Heart Valve Prosthesis Implantation.adverse effects.instrumentation.mortality
Humans
Male
Middle Aged
Mitral Valve.surgery
Prosthesis Design
Prosthesis Fitting
Treatment Outcome
Victoria.epidemiology
Appears in Collections:Journal articles

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