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PTMC後の平均左房圧の正常化を規定する因子について検討し,PTMCが最も有用となる症例の条件を検討した.対象51例(年齢26〜66歳,男性8例,女性43例)中,術後平均左房圧が正常化(12mmHg以下)した群をA群(31例),非正常化群をB群(20例)とした.A群とB群では,年齢(A群:44±6歳vsB群:48±6歳,p<O.05),心房細動の合併率(A群:35%vsB群:65%,p<0.05),僧帽弁の石灰化(A群:29%vsB群:65%,p<0.01),術後僧帽弁口面積(A群:1.79±0.69cm2vs B群:1.40±0.50cm2,p<0.05),術後NYHA機能分類Ⅰ度への改善率(A群:90%vs B群:60%,p<0.01)に有意差を認めた.40歳未満の群では術後平均左房圧は75%の症例で正常化し,50歳以上の群では41%の症例でしか正常化しなかった.若年者例(特に40歳未満),洞調律例,僧帽弁非石灰化例に対するPTMCは非常に有効であると考えられた.
The aim of this report is to investigate the factors which influence mean left atrial pressure (LAP) after percutaneous transvenous mitral commissurotomy (PTMC) and the characteristics of patients in whom PTMC is most effective.
Fifty one patients with symptomatic mitral stenosis underwent PTMC. The patients included 8 males and 43 females, aged 26-66 years (mean age of 46). These patients were classified into two groups according to LAP after PTMC: 31 cases with LAP after PTMC of 12 mmHg or less (group A) and 20 cases with LAP after PTMC greater than 12 mmHg (group B).
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