Right Ventricular Septal Pacing Preserves Global Left Ventricular Longitudinal Function in Comparison With Apical Pacing : – Analysis of Speckle Tracking Echocardiography –
スポンサーリンク
概要
- 論文の詳細を見る
Background: Right ventricular (RV) pacing alters left ventricular (LV) mechanical activation, resulting in adverse impacts on LV function. This study was aimed to investigate the acute effect of RV apical (RVA) and septal pacing (RVS) on LV dyssynchrony and function using speckle tracking echocardiography. Methods and Results: The 103 patients (749 years) with symptomatic bradyarrhythmia and preserved LV ejection fraction, and 50 age-matched control subjects were studied. All patients received a permanent pacemaker and were randomly assigned into 2 groups (RVA: n=51, RVS: n=52). After insertion, patients underwent an echocardiographic study during RV pacing. LV dyssynchrony and global strain parameters were analyzed using speckle tracking echocardiography. The QRS width and dyssynchrony indices by longitudinal and radial strain were significantly greater in RVA than in both the control and RVS. The LV longitudinal dyssynchrony index was significantly related to global longitudinal strain (GLS) among 103 patients receiving RV pacing (R2=0.25, P<0.0001). The GLS in RVA were the lowest among the 3 groups (GLS: Control: -18.22.4%, RVA: -14.33.1%, P<0.001 vs. control, RVS: -16.82.7%, P<0.01 vs. RVA). Conclusions: RVA created heterogeneous LV contraction, which resulted in deteriorated LV longitudinal contraction. RVS could be a better pacing alternative in terms of less LV dyssynchrony and better longitudinal function compared to RVA. (Circ J 2011; 75: 1609-1615)
論文 | ランダム
- 農業環境政策の形成と展開に関する研究(2) 事例分析：埼玉県所沢市・三富新田(都市郊外)農業の多面的機能
- 表明選好法による農業・農村の持つ多面的機能の経済評価
- ブックガイド 祖田修・佐藤晃一・太田猛彦・谷口旭編 『農林水産業の多面的機能』
- ノルウェー 将来危機に備える食料輸入国の食料安全保障政策 (フードセキュリティ--世界の食料安全保障政策はいま) -- (主要国の食料安全保障政策)
- 水産業の多面的機能に関する評価と支援策(27)離島漁業再生へ、さまざまな取り組み--05年度開始の交付金制度--06年度は64%増の77市町村が活用