Effect of mitral valve replacement on reduction of left atrial size.
Asian Cardiovasc Thorac Ann
; 21(3): 288-92, 2013 Jun.
Article
em En
| MEDLINE
| ID: mdl-24570494
ABSTRACT
INTRODUCTION:
asymptomatic left atrial enlargement is not uncommon in rheumatic mitral valve disease. We studied the change in size of the left atrium after mitral valve replacement. PATIENTS ANDMETHODS:
between January and December 2005, 116 patients underwent isolated mitral valve replacement. Two groups were identified based on left atrial size group 1 < 60 mm (n = 79) and group 2 > 60 mm (n = 37). The patients were followed up for 40.4 ± 19.3 months Clinical assessment, preoperative and last postoperative echocardiograms were considered for analysis.RESULTS:
the left atrium decreased by 5.84 mm ± 10.5 in group 1 compared to 20.9 mm ± 10.64 in group 2 (p = 0.0001). This correlated with preoperative mitral valve area (p = 0.009), preoperative mitral regurgitation (p = 0.000), and preoperative atrial fibrillation (p = 0.022). Linear regression analysis revealed atrial fibrillation (p = 0.001, b1 = 6.006), a high grade of mitral regurgitation (p = 0.001, b1 = -3.812), and larger size of the left atrium (p = 0.000, b1 = -0.701) predicted a greater reduction of left atrial size during follow-up. Left atrial size decreased by 28 mm in patients with a preoperative left atrium >60 mm (75% sensitivity and 100% specificity).CONCLUSION:
the asymptomatic left atrium reduces in size considerably after mitral valve replacement, and the decrease is greater in patients with a left atrium >60 mm in size.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Cardiomegalia
/
Implante de Prótese de Valva Cardíaca
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Valva Mitral
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Insuficiência da Valva Mitral
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article