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Prosthesis-Patient Mismatch after Mitral Valve Replacement: Comparison of Different Methods of Effective Orifice Area Calculation

 In-Jeong Cho  ;  Geu-Ru Hong  ;  Seung Hyun Lee  ;  Sak Lee  ;  Byung-Chul Chang  ;  Chi Young Shim  ;  Hyuk-Jae Chang  ;  Jong-Won Ha  ;  Namsik Chung 
 Yonsei Medical Journal, Vol.57(2) : 328-336, 2016 
Journal Title
 Yonsei Medical Journal 
Issue Date
Adult ; Aged ; Echocardiography ; Echocardiography, Doppler ; Female ; Heart Valve Diseases/surgery* ; Heart Valve Prosthesis* ; Heart Valve Prosthesis Implantation/adverse effects* ; Heart Valve Prosthesis Implantation/methods ; Hemodynamics ; Humans ; Incidence ; Male ; Middle Aged ; Mitral Valve/physiopathology ; Mitral Valve/surgery* ; Prevalence ; Retrospective Studies ; Treatment Outcome
Mitral valve ; heart valve prosthesis
PURPOSE: The incidence of prosthesis-patient mismatch (PPM) after mitral valve replacement (MVR) has been reported to vary. The purpose of the current study was to investigate incidence of PPM according to the different methods of calculating effective orifice area (EOA), including the continuity equation (CE), pressure half time (PHT) method and use of reference EOA, and to compare these with various echocardiographic variables. MATERIALS AND METHODS: We retrospectively reviewed 166 individuals who received isolated MVR due to rheumatic mitral stenosis and had postoperative echocardiography performed between 12 and 60 months after MVR. EOA was determined by CE (EOA(CE)) and PHT using Doppler echocardiography. Reference EOA was determined from the literature or values offered by the manufacturer. Indexed EOA was used to define PPM as present if ≤1.2 cm²/m². RESULTS: Prevalence of PPM was different depending on the methods used to calculate EOA, ranging from 7% in PHT method to 49% in referred EOA method to 62% in CE methods. The intraclass correlation coefficient was low between the methods. PPM was associated with raised trans-prosthetic pressure, only when calculated by CE (p=0.021). Indexed EOA(CE) was the only predictor of postoperative systolic pulmonary artery (PA) pressure, even after adjusting for age, preoperative systolic PA pressure and postoperative left atrial volume index (p<0.001). CONCLUSION: Prevalence of mitral PPM varied according to the methods used to calculate EOA in patients with mitral stenosis after MVR. Among the various methods used to define PPM, EOA(CE) was the only predictor of postoperative hemodynamic parameters.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Thoracic and Cardiovascular Surgery (흉부외과학교실) > 1. Journal Papers
Yonsei Authors
심지영(Shim, Chi Young) ORCID logo https://orcid.org/0000-0002-6136-0136
이삭(Lee, Sak) ORCID logo https://orcid.org/0000-0001-6130-2342
이승현(Lee, Seung Hyun) ORCID logo https://orcid.org/0000-0002-0311-6565
장병철(Chang, Byung Chul)
장혁재(Chang, Hyuck Jae) ORCID logo https://orcid.org/0000-0002-6139-7545
정남식(Chung, Nam Sik)
조인정(Cho, In Jeong)
하종원(Ha, Jong Won) ORCID logo https://orcid.org/0000-0002-8260-2958
홍그루(Hong, Geu Ru) ORCID logo https://orcid.org/0000-0003-4981-3304
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