摘要:目的 該篇META分析比較右室非心尖部起搏(RVNAP)和心尖部起搏(RVAP)對心功能的影響。方法 檢索MEDLINE、EMBASE和Cochrane Controlled Trials Register數據庫,收集隨訪時間≥2個月的隨機對照試驗。結果 20個試驗包括1114例患者入選。與RVAP相比,RVNAP不僅在起搏閾值及R波感知方面表現優異,左室射血分數在隨訪末也明顯升高。結論 RVNAP在電極參數方面表現出令人滿意的長期結果,并在6個月隨訪后,提高左室射血分數方面作用有利。
關鍵詞:META分析;右室非心尖部起搏;心功能;文獻檢索
中圖分類號:R1,R4
Taking an Example of the Effects of Right Ventricular Pacing on Cardiac Function to Discuss META Analysi
WANG Wei-zong1,YIN Xiang-cui2,ZHANG Yu-jiao1
(1.Shandong University,Jinan 250014,Shandong,China;2.Shandong Qianfoshan Hospital,Jinan 250014,Shandong,China)
Abstract:Objective A meta-analysis of randomized controlled trials (RCTs) was conducted to compare the effects of right ventricular nonapical (RVNA) and right ventricular apical (RVA) pacing on cardiac function. Methods A systematic literature search was performed using MEDLINE, EMBASE, and the Cochrane Library to identify RCTs comparing RVNA pacing with RVA pacing with follow-up ≥2 months. Results Twenty RCTs involving 1,114 patients were included. Compared with RVA pacing, RVNA pacing exhibited not only excellent pacing threshold and R-wave amplitude but also higher impedance. RVNA pacing showed a significant increase in left ventricular ejection fraction (LVEF) at the end of follow-up. Conclusion This meta-analysis found that RVNA pacing exhibited satisfactory long-term lead performance compared with RVA pacing and demonstrated beneficial effects in improving LVEF after the 6-month follow-up.
Key words:META Analysis; Right Ventricular Nonapical Pacing; Cardiac Function; Literature Retrieval
自從心臟起搏器問世以來 [1],因為右室心尖部易于識別并且心尖部起搏具有良好的電極穩定性等優點,右室心尖部起搏(RVAP)一直被認為是治療癥狀性病態竇房結綜合征或慢性高度房室傳導阻滯中安裝臨時或永久心臟起搏器的首要選擇 [2]。然而,越來越多的研究表明,長期RVAP改變了心室激動順序,引起節段性室壁運動異常,損害了左室收縮及舒張功能,增加了心衰的發生率和死亡率,這將會抵消其潛在的優勢 [3~5]。因此,尋找一個具有同步化心室激動順序的起搏位點從未間斷,并且一系列的右心室非心尖部起搏位點被發現 [6, 7],但是,既往關于不同起搏位點的研究得到了不一致的結果 [8~11]。在以前的薈萃分析中,de Cock [12]發現右室非心尖部起搏(RVNAP)較RVAP在血流動力學方面有了很大提高。最近,另一項涉及14個隨機對照試驗的薈萃分析[13]指出,在一定時間起搏后,RVNAP左室射血分數是高于RVAP的。然而,這項研究只描述了左室射血分數這一指標,且研究表明需要進一步比較更多的參數。……