今日の臨床サポート 今日の臨床サポート
関連論文:
img  1:  Prognostic significance of strain Doppler imaging in light-chain amyloidosis.
 
著者: Jun Koyama, Rodney H Falk
雑誌名: JACC Cardiovasc Imaging. 2010 Apr;3(4):333-42. doi: 10.1016/j.jcmg.2009.11.013.
Abstract/Text OBJECTIVES: To clarify the prognostic value of strain and strain rate imaging in light-chain (AL) amyloidosis.
BACKGROUND: Myocardial strain and strain rate Doppler imaging are objective measurements that may detect regional subtle myocardial functional abnormalities in patients with amyloidosis.
METHODS: We prospectively examined 119 consecutive, untreated patients with biopsy-proven AL amyloidosis. The mean values of tissue velocity, strain, and strain rate were calculated from the basal, mid, and apical left ventricular (LV) multiple walls in apical 2- and 4-chamber views. The prognostic value of these parameters was compared with standard 2-dimensional echocardiographic and Doppler measurements of transmitral and pulmonary venous flow.
RESULTS: Seventy patients had cardiac involvement defined as the mean value of LV wall thickness greater than 12 mm. Thirty-two patients (27%) (including 22 proven cardiac deaths) died during a mean follow-up period of 285 +/- 136 days. No echocardiographic or Doppler features differentiated patients with cardiac involvement without congestive heart failure (CHF) from noncardiac amyloid group other than the pre-defined wall thickness and LV end-diastolic and end-systolic diameters. On the other hand, strain rate and strain imaging clearly detected differences of longitudinal LV myocardial deformation among 3 groups (noncardiac involvement group, cardiac amyloidosis without CHF group, and cardiac amyloidosis with CHF group). Univariate analysis showed that strain rate, strain, and tissue velocity values were statistically significant predictors of outcome at most of the sites. Multivariate analysis showed that the mean LV basal strain was the only independent predictor of both cardiac and overall deaths.
CONCLUSIONS: Among patients with AL amyloidosis, the mean basal strain, a measure of longitudinal LV function, was a powerful predictor of clinical outcome and was superior to standard 2-dimensional echocardiographic, Doppler flow measurements, and simple tissue velocity indexes.

Copyright 2010 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.
PMID 20394893  JACC Cardiovasc Imaging. 2010 Apr;3(4):333-42. doi: 10.1016/j.jcmg.2009.11.013.
戻る

さらなるご利用にはご登録が必要です。

こちらよりご契約または優待日間無料トライアルお申込みをお願いします。

(※トライアルご登録は1名様につき、一度となります)


ご契約の場合はご招待された方だけのご優待特典があります。

以下の優待コードを入力いただくと、

契約期間が通常12ヵ月のところ、14ヵ月ご利用いただけます。

優待コード: (利用期限:まで)

ご契約はこちらから